/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/brs5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:37:02,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:37:02,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:37:02,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:37:02,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:37:02,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:37:02,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:37:02,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:37:02,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:37:02,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:37:02,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:37:02,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:37:02,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:37:02,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:37:02,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:37:02,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:37:02,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:37:02,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:37:02,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:37:02,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:37:02,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:37:02,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:37:02,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:37:02,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:37:02,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:37:02,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:37:02,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:37:02,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:37:02,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:37:02,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:37:02,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:37:02,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:37:02,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:37:02,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:37:02,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:37:02,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:37:02,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:37:02,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:37:02,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:37:02,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:37:02,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:37:02,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:37:02,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:37:02,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:37:02,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:37:02,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:37:02,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:37:02,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:37:02,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:37:02,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:37:02,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:37:02,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:37:02,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:37:02,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:37:02,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:37:02,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:37:02,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:37:02,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:37:02,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:37:02,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:37:02,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:37:02,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:37:02,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:37:02,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:37:02,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:37:02,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:37:02,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:37:02,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:37:02,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:37:02,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:37:02,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:37:02,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:37:02,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:37:02,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:37:02,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:37:02,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:37:02,722 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:37:02,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs5.c [2020-10-26 19:37:02,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c25690f1/d43f6fb50d244b40987f86e71c59e695/FLAG6556785bd [2020-10-26 19:37:03,357 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:37:03,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs5.c [2020-10-26 19:37:03,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c25690f1/d43f6fb50d244b40987f86e71c59e695/FLAG6556785bd [2020-10-26 19:37:03,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c25690f1/d43f6fb50d244b40987f86e71c59e695 [2020-10-26 19:37:03,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:37:03,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:37:03,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:03,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:37:03,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:37:03,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:03" (1/1) ... [2020-10-26 19:37:03,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdeba37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:03, skipping insertion in model container [2020-10-26 19:37:03,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:03" (1/1) ... [2020-10-26 19:37:03,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:37:03,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:37:04,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:04,074 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:37:04,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:04,144 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:37:04,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04 WrapperNode [2020-10-26 19:37:04,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:04,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:37:04,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:37:04,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:37:04,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... [2020-10-26 19:37:04,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:37:04,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:37:04,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:37:04,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:37:04,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:37:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:37:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:37:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:37:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:37:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:37:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:37:04,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:37:04,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:37:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:37:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:37:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:37:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:37:04,723 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:37:04,723 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:37:04,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:04 BoogieIcfgContainer [2020-10-26 19:37:04,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:37:04,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:37:04,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:37:04,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:37:04,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:37:03" (1/3) ... [2020-10-26 19:37:04,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7588a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:04, skipping insertion in model container [2020-10-26 19:37:04,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:04" (2/3) ... [2020-10-26 19:37:04,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7588a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:04, skipping insertion in model container [2020-10-26 19:37:04,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:04" (3/3) ... [2020-10-26 19:37:04,734 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2020-10-26 19:37:04,746 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:37:04,751 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:37:04,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:04,796 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:04,796 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:04,797 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:04,797 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:04,797 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:04,797 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:04,797 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:04,797 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:37:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:04,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:04,823 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] [2020-10-26 19:37:04,823 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-26 19:37:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:04,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355328418] [2020-10-26 19:37:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:05,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:05,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-26 19:37:05,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 19:37:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:37:05,579 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-26 19:37:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:05,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:37:05,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:05,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:05,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:05,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:37:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:05,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:05,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355328418] [2020-10-26 19:37:05,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:05,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:37:05,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209817817] [2020-10-26 19:37:05,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:37:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:37:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:05,718 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-26 19:37:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:05,947 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-26 19:37:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:37:05,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-26 19:37:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:05,960 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:37:05,960 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:37:05,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:37:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 19:37:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:37:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:37:06,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-26 19:37:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:06,027 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:37:06,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:37:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:37:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:06,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:06,029 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] [2020-10-26 19:37:06,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:06,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-26 19:37:06,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:06,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428999918] [2020-10-26 19:37:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:06,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:06,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:06,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-26 19:37:06,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:06,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:37:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:06,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:06,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:06,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:06,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:06,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:06,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:06,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:06,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:06,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:06,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:06,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:06,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:06,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:06,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428999918] [2020-10-26 19:37:06,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:06,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:06,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673545680] [2020-10-26 19:37:06,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:06,566 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-26 19:37:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:06,819 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-26 19:37:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:06,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:37:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:06,822 INFO L225 Difference]: With dead ends: 40 [2020-10-26 19:37:06,822 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:37:06,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:37:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 19:37:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:37:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-26 19:37:06,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-26 19:37:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:06,839 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-26 19:37:06,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-26 19:37:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:06,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:06,842 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] [2020-10-26 19:37:06,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:06,843 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-26 19:37:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:06,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654816115] [2020-10-26 19:37:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:06,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:07,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:07,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:07,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-26 19:37:07,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:07,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:07,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:37:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:08,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:08,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:08,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:08,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:08,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:08,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:08,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:08,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:08,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:08,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654816115] [2020-10-26 19:37:08,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:08,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381132017] [2020-10-26 19:37:08,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:08,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:08,245 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-26 19:37:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:08,952 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-26 19:37:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:08,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-26 19:37:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:08,955 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:37:08,955 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:37:08,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:37:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-26 19:37:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:37:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-26 19:37:08,978 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2020-10-26 19:37:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:08,982 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-26 19:37:08,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-26 19:37:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:08,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:08,985 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] [2020-10-26 19:37:08,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:08,985 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:08,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-26 19:37:08,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:08,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248170281] [2020-10-26 19:37:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:09,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:09,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-26 19:37:09,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:37:09,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:09,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:09,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:09,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:09,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:09,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:09,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248170281] [2020-10-26 19:37:09,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:09,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:37:09,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752838068] [2020-10-26 19:37:09,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:09,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:09,722 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2020-10-26 19:37:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:09,984 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-26 19:37:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:37:09,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:37:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:09,986 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:37:09,986 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:37:09,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:37:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:37:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:37:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:37:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-26 19:37:09,995 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-26 19:37:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:09,995 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-26 19:37:09,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-26 19:37:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:37:09,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:09,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:09,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:09,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-26 19:37:09,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:09,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133844913] [2020-10-26 19:37:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:37:15,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 19:37:15,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:37:15,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:15,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:15,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:15,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:15,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:15,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:15,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:15,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:15,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:15,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:15,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133844913] [2020-10-26 19:37:15,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:15,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:15,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663970296] [2020-10-26 19:37:15,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:15,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:15,560 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 16 states. [2020-10-26 19:37:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:16,341 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-26 19:37:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:37:16,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-26 19:37:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:16,343 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:37:16,343 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:37:16,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:37:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:37:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-10-26 19:37:16,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:37:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-26 19:37:16,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 34 [2020-10-26 19:37:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:16,363 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-26 19:37:16,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-26 19:37:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:16,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:16,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:37:16,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:16,367 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash -447454014, now seen corresponding path program 2 times [2020-10-26 19:37:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:16,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052685936] [2020-10-26 19:37:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:21,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:21,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:21,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:21,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:21,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:21,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:21,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:21,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:21,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:21,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:21,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:21,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:21,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052685936] [2020-10-26 19:37:21,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:21,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:21,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848086417] [2020-10-26 19:37:21,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:21,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:21,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:21,648 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 13 states. [2020-10-26 19:37:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:22,339 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-10-26 19:37:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:37:22,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-26 19:37:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:22,341 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:37:22,341 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:37:22,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:37:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:37:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2020-10-26 19:37:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:37:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-26 19:37:22,350 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 37 [2020-10-26 19:37:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:22,351 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-26 19:37:22,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-26 19:37:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:22,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:22,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:37:22,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:22,353 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 3 times [2020-10-26 19:37:22,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:22,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045091584] [2020-10-26 19:37:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:22,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:27,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:27,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:37:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:37:27,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:37:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:27,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:27,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:27,848 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:37:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:28,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 19:37:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:37:28,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:28,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:28,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:28,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:28,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:28,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045091584] [2020-10-26 19:37:28,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:37:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703152018] [2020-10-26 19:37:28,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:37:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:37:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:28,494 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 20 states. [2020-10-26 19:37:29,501 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-26 19:37:29,696 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-26 19:37:29,886 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-26 19:37:30,208 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-26 19:37:30,576 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-26 19:37:30,884 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-26 19:37:31,076 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:37:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:31,287 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-26 19:37:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:37:31,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-26 19:37:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:31,289 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:37:31,289 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:37:31,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:37:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:37:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-26 19:37:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:37:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-26 19:37:31,302 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 37 [2020-10-26 19:37:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:31,302 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-26 19:37:31,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:37:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-26 19:37:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:31,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:31,304 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-26 19:37:31,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:31,304 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1003722988, now seen corresponding path program 4 times [2020-10-26 19:37:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:31,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658243478] [2020-10-26 19:37:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:36,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:37:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:37:36,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:37:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:36,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:36,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:36,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:36,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:36,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:37:36,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658243478] [2020-10-26 19:37:36,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:36,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:36,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136670370] [2020-10-26 19:37:36,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:36,549 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2020-10-26 19:37:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:37,175 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-26 19:37:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:37:37,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-26 19:37:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:37,179 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:37:37,179 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:37:37,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:37:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:37:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-26 19:37:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:37:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-26 19:37:37,190 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 40 [2020-10-26 19:37:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:37,191 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-26 19:37:37,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-26 19:37:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:37,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:37,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 19:37:37,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:37,192 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash -264327849, now seen corresponding path program 5 times [2020-10-26 19:37:37,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:37,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945416310] [2020-10-26 19:37:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:37:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:42,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:42,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:42,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:42,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:42,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:42,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:42,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:42,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945416310] [2020-10-26 19:37:42,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:42,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:37:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781374371] [2020-10-26 19:37:42,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:37:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:42,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:37:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:42,816 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 17 states. [2020-10-26 19:37:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:43,876 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-26 19:37:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:37:43,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-26 19:37:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:43,879 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:37:43,879 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:37:43,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:37:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:37:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2020-10-26 19:37:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:37:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-26 19:37:43,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2020-10-26 19:37:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:43,891 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-26 19:37:43,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:37:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-26 19:37:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:43,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:43,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-26 19:37:43,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:43,893 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash -814888421, now seen corresponding path program 6 times [2020-10-26 19:37:43,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:43,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947620670] [2020-10-26 19:37:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:43,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:48,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:37:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:37:48,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:49,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:49,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:49,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:49,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:49,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:49,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947620670] [2020-10-26 19:37:49,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:49,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:49,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971874471] [2020-10-26 19:37:49,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:49,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:49,308 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 16 states. [2020-10-26 19:37:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:50,374 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-26 19:37:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:37:50,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 19:37:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:50,376 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:37:50,376 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:37:50,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:37:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:37:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-26 19:37:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:37:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 19:37:50,400 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-10-26 19:37:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:50,400 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 19:37:50,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 19:37:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:37:50,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:50,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:50,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:50,405 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1651460684, now seen corresponding path program 7 times [2020-10-26 19:37:50,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:50,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462740178] [2020-10-26 19:37:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:50,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:55,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:37:55,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:37:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:37:55,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:37:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:37:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:56,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:56,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:56,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:56,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:56,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462740178] [2020-10-26 19:37:56,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:56,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:37:56,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258312105] [2020-10-26 19:37:56,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:37:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:37:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:37:56,501 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 25 states. [2020-10-26 19:37:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:59,725 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-26 19:37:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:37:59,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-26 19:37:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:59,728 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:37:59,728 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:37:59,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:37:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:37:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-26 19:37:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:37:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-26 19:37:59,744 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 46 [2020-10-26 19:37:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:59,745 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-26 19:37:59,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:37:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-26 19:37:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:37:59,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:59,746 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:59,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:37:59,747 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1286146206, now seen corresponding path program 8 times [2020-10-26 19:37:59,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:59,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735289868] [2020-10-26 19:37:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:38:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:05,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:05,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:05,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:05,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735289868] [2020-10-26 19:38:05,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:05,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:05,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875975983] [2020-10-26 19:38:05,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:05,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:05,250 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 19 states. [2020-10-26 19:38:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:06,719 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2020-10-26 19:38:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:38:06,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-26 19:38:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:06,723 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:38:06,723 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:38:06,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:38:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:38:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-10-26 19:38:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:38:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-26 19:38:06,760 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 49 [2020-10-26 19:38:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-26 19:38:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:38:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-26 19:38:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:06,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:06,764 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:06,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:06,764 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:06,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:06,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1524909305, now seen corresponding path program 9 times [2020-10-26 19:38:06,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:06,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354443728] [2020-10-26 19:38:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:11,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:11,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:38:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:12,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:12,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:12,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:12,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:12,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:12,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:12,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:12,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:12,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:12,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354443728] [2020-10-26 19:38:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:38:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704752411] [2020-10-26 19:38:12,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:38:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:38:12,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:12,167 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 17 states. [2020-10-26 19:38:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:15,322 INFO L93 Difference]: Finished difference Result 254 states and 321 transitions. [2020-10-26 19:38:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:38:15,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-26 19:38:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:15,325 INFO L225 Difference]: With dead ends: 254 [2020-10-26 19:38:15,325 INFO L226 Difference]: Without dead ends: 230 [2020-10-26 19:38:15,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=876, Invalid=2906, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:38:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-26 19:38:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 88. [2020-10-26 19:38:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:38:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-10-26 19:38:15,360 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 49 [2020-10-26 19:38:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:15,361 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-10-26 19:38:15,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:38:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-10-26 19:38:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:15,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:15,369 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:15,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:15,369 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1867062647, now seen corresponding path program 10 times [2020-10-26 19:38:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942355786] [2020-10-26 19:38:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:20,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:20,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:38:20,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5270 [2020-10-26 19:38:20,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:38:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:20,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:38:20,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:21,432 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-26 19:38:21,609 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-26 19:38:21,826 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 37 [2020-10-26 19:38:22,171 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2020-10-26 19:38:22,602 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 48 [2020-10-26 19:38:23,019 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 37 [2020-10-26 19:38:23,204 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2020-10-26 19:38:23,436 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-10-26 19:38:23,765 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 36 [2020-10-26 19:38:24,015 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2020-10-26 19:38:24,217 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2020-10-26 19:38:24,512 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:38:24,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:24,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:24,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:24,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:24,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:24,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:24,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:24,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:24,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:24,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942355786] [2020-10-26 19:38:24,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:24,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:38:24,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161143920] [2020-10-26 19:38:24,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:38:24,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:38:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:38:24,937 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 28 states. [2020-10-26 19:38:25,494 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-26 19:38:26,072 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-26 19:38:26,425 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-26 19:38:26,698 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2020-10-26 19:38:27,022 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2020-10-26 19:38:27,376 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:38:27,806 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2020-10-26 19:38:28,333 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-26 19:38:28,634 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-26 19:38:28,942 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-26 19:38:29,325 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-26 19:38:29,695 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-26 19:38:29,922 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-26 19:38:30,418 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-10-26 19:38:30,733 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-26 19:38:30,949 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 19:38:31,166 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-26 19:38:31,656 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-10-26 19:38:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:32,045 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-10-26 19:38:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:38:32,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-26 19:38:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:32,048 INFO L225 Difference]: With dead ends: 121 [2020-10-26 19:38:32,048 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:38:32,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=574, Invalid=3086, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:38:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:38:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-10-26 19:38:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:38:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-26 19:38:32,067 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 52 [2020-10-26 19:38:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:32,067 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-26 19:38:32,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:38:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-26 19:38:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:32,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:32,069 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:32,069 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2105825746, now seen corresponding path program 11 times [2020-10-26 19:38:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847929832] [2020-10-26 19:38:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:37,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:37,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-26 19:38:37,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:38:37,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:38:37,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:37,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:37,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:37,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:37,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:37,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:37,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:37,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:37,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:37,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:38:37,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847929832] [2020-10-26 19:38:37,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:37,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:37,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218264927] [2020-10-26 19:38:37,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:37,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:37,537 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 16 states. [2020-10-26 19:38:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:38,447 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2020-10-26 19:38:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:38:38,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-26 19:38:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:38,449 INFO L225 Difference]: With dead ends: 185 [2020-10-26 19:38:38,449 INFO L226 Difference]: Without dead ends: 153 [2020-10-26 19:38:38,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:38:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-26 19:38:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-26 19:38:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:38:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-26 19:38:38,477 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 52 [2020-10-26 19:38:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-26 19:38:38,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-26 19:38:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:38,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:38,479 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:38,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:38,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:38,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1357126149, now seen corresponding path program 12 times [2020-10-26 19:38:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:38,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50816425] [2020-10-26 19:38:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:38:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:44,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:44,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:44,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:44,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:44,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:44,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:44,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:44,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:44,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:44,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:44,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:44,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50816425] [2020-10-26 19:38:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:38:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480144179] [2020-10-26 19:38:44,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:38:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:38:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:38:44,211 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 22 states. [2020-10-26 19:38:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:45,740 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-10-26 19:38:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:38:45,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-26 19:38:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:45,742 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:38:45,742 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:38:45,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=1704, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:38:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:38:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2020-10-26 19:38:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:38:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-26 19:38:45,756 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 55 [2020-10-26 19:38:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-26 19:38:45,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:38:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-26 19:38:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:45,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:45,757 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:45,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:45,757 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -831486016, now seen corresponding path program 13 times [2020-10-26 19:38:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:45,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425980713] [2020-10-26 19:38:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:46,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:49,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:50,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:50,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:38:50,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:51,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:51,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:51,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:51,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:51,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:51,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:51,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:51,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:51,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 67 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:38:51,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425980713] [2020-10-26 19:38:51,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:51,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781529993] [2020-10-26 19:38:51,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:51,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:51,117 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 16 states. [2020-10-26 19:38:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:51,818 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2020-10-26 19:38:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:38:51,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-26 19:38:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:51,820 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:38:51,821 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:38:51,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:38:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-10-26 19:38:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:38:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-26 19:38:51,831 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 55 [2020-10-26 19:38:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:51,831 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-26 19:38:51,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-26 19:38:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:38:51,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:51,832 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:51,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:38:51,832 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash -622499054, now seen corresponding path program 14 times [2020-10-26 19:38:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738748580] [2020-10-26 19:38:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5217 [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:38:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:38:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,981 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2020-10-26 19:38:59,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:59,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:59,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:59,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:59,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738748580] [2020-10-26 19:38:59,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:59,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:38:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093846589] [2020-10-26 19:38:59,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:38:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:38:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:59,053 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 29 states. [2020-10-26 19:39:00,098 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-26 19:39:00,652 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-26 19:39:00,840 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:39:01,158 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-26 19:39:01,421 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:39:01,818 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-26 19:39:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:02,570 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-26 19:39:02,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:39:02,571 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-26 19:39:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:02,572 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:39:02,572 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:39:02,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:39:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:39:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2020-10-26 19:39:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:39:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-26 19:39:02,589 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 58 [2020-10-26 19:39:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:02,589 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-26 19:39:02,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:39:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-26 19:39:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:02,590 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:02,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:39:02,590 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1900473984, now seen corresponding path program 15 times [2020-10-26 19:39:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:02,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609061683] [2020-10-26 19:39:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:07,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:39:07,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:07,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:39:07,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:08,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:08,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:08,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609061683] [2020-10-26 19:39:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:08,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:39:08,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269111848] [2020-10-26 19:39:08,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:39:08,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:39:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:39:08,235 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 25 states. [2020-10-26 19:39:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:10,061 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2020-10-26 19:39:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:39:10,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-26 19:39:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:10,063 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:39:10,063 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:39:10,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=584, Invalid=2278, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:39:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:39:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-26 19:39:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:39:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2020-10-26 19:39:10,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 61 [2020-10-26 19:39:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:10,089 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2020-10-26 19:39:10,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:39:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2020-10-26 19:39:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:10,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:10,090 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:10,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:39:10,091 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2069674585, now seen corresponding path program 16 times [2020-10-26 19:39:10,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:10,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166040119] [2020-10-26 19:39:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:10,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:15,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:15,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:39:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:39:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:39:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:39:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:15,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:15,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:15,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:15,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:15,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:15,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:15,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:15,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166040119] [2020-10-26 19:39:15,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:15,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:39:15,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246629467] [2020-10-26 19:39:15,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:39:15,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:15,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:39:15,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:39:15,363 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 18 states. [2020-10-26 19:39:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:16,220 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2020-10-26 19:39:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:39:16,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-26 19:39:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:16,225 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:39:16,226 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:39:16,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:39:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:39:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2020-10-26 19:39:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:39:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:39:16,240 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 61 [2020-10-26 19:39:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:16,240 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:39:16,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:39:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:39:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:39:16,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:16,241 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:16,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:16,242 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1344833045, now seen corresponding path program 17 times [2020-10-26 19:39:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:16,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973730596] [2020-10-26 19:39:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:39:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:21,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:39:21,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,988 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-26 19:39:22,220 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-26 19:39:22,392 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-26 19:39:22,575 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:39:23,129 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-26 19:39:23,480 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-26 19:39:23,904 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-26 19:39:24,243 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-26 19:39:24,715 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2020-10-26 19:39:25,052 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-26 19:39:25,480 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-26 19:39:25,744 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-26 19:39:26,090 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-26 19:39:26,284 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:39:26,463 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-26 19:39:27,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:27,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:27,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973730596] [2020-10-26 19:39:27,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:27,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:39:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029432830] [2020-10-26 19:39:27,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:39:27,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:39:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:39:27,266 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 36 states. [2020-10-26 19:39:27,840 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 12 [2020-10-26 19:39:28,151 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-26 19:39:28,376 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-26 19:39:28,626 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-26 19:39:28,850 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-26 19:39:29,099 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-26 19:39:29,476 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-26 19:39:29,739 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2020-10-26 19:39:30,044 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-26 19:39:30,300 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-26 19:39:30,596 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-26 19:39:31,062 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-26 19:39:31,325 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-10-26 19:39:31,564 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-26 19:39:32,982 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 214 DAG size of output: 121 [2020-10-26 19:39:33,425 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 51 [2020-10-26 19:39:33,930 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 74 [2020-10-26 19:39:35,750 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 185 DAG size of output: 184 [2020-10-26 19:39:35,971 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-26 19:39:38,076 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 192 DAG size of output: 191 [2020-10-26 19:39:38,582 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 110 [2020-10-26 19:39:38,966 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-26 19:39:39,488 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 110 [2020-10-26 19:39:42,994 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 217 DAG size of output: 212 [2020-10-26 19:39:43,206 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 19 [2020-10-26 19:39:45,359 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 189 DAG size of output: 188 [2020-10-26 19:39:47,706 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 195 DAG size of output: 194 [2020-10-26 19:39:49,945 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 170 DAG size of output: 167 [2020-10-26 19:39:50,254 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-26 19:39:52,556 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 175 DAG size of output: 170 [2020-10-26 19:39:52,882 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-26 19:39:53,591 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-26 19:39:54,012 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-26 19:39:56,825 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 214 DAG size of output: 205 [2020-10-26 19:39:57,480 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-26 19:39:59,373 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 158 DAG size of output: 153 [2020-10-26 19:39:59,900 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-26 19:40:02,798 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 227 DAG size of output: 210 [2020-10-26 19:40:03,230 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-26 19:40:04,574 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-26 19:40:05,584 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-26 19:40:06,676 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 129 [2020-10-26 19:40:07,479 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-26 19:40:08,313 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2020-10-26 19:40:08,559 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:40:08,739 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-26 19:40:09,112 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-26 19:40:11,587 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 186 DAG size of output: 185 [2020-10-26 19:40:13,887 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 188 DAG size of output: 187 [2020-10-26 19:40:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:14,347 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2020-10-26 19:40:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-26 19:40:14,349 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 64 [2020-10-26 19:40:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:14,351 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:40:14,351 INFO L226 Difference]: Without dead ends: 119 [2020-10-26 19:40:14,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=993, Invalid=7197, Unknown=0, NotChecked=0, Total=8190 [2020-10-26 19:40:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-26 19:40:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2020-10-26 19:40:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:40:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-26 19:40:14,373 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 64 [2020-10-26 19:40:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:14,374 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-26 19:40:14,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:40:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-26 19:40:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:40:14,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:14,375 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:14,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:40:14,375 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:14,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1567314077, now seen corresponding path program 18 times [2020-10-26 19:40:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:14,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559187080] [2020-10-26 19:40:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:19,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:40:19,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:40:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:40:19,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:40:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 19:40:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:20,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:20,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:20,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:20,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:20,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559187080] [2020-10-26 19:40:20,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:20,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:40:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490026980] [2020-10-26 19:40:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:40:20,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:40:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:40:20,227 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 23 states. [2020-10-26 19:40:21,324 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 19:40:21,654 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 19:40:22,738 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-26 19:40:22,952 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-26 19:40:23,203 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-26 19:40:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:23,686 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2020-10-26 19:40:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:40:23,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-10-26 19:40:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:23,692 INFO L225 Difference]: With dead ends: 244 [2020-10-26 19:40:23,692 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:40:23,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:40:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:40:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 122. [2020-10-26 19:40:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:40:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-26 19:40:23,731 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 67 [2020-10-26 19:40:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:23,732 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-26 19:40:23,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:40:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-26 19:40:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:40:23,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:23,733 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:23,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:40:23,733 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash 774818466, now seen corresponding path program 19 times [2020-10-26 19:40:23,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:23,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793082245] [2020-10-26 19:40:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:23,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:28,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:40:28,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:40:28,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:40:28,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:40:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:40:28,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:28,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:28,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:28,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:28,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:40:29,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793082245] [2020-10-26 19:40:29,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:29,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:40:29,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839460309] [2020-10-26 19:40:29,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:40:29,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:40:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:40:29,003 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 11 states. [2020-10-26 19:40:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:29,631 INFO L93 Difference]: Finished difference Result 210 states and 246 transitions. [2020-10-26 19:40:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:40:29,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-26 19:40:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:29,634 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:40:29,634 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:40:29,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:40:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:40:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-26 19:40:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:40:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-10-26 19:40:29,658 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 67 [2020-10-26 19:40:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:29,658 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-10-26 19:40:29,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:40:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-10-26 19:40:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:40:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:29,659 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:29,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:40:29,659 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1049578080, now seen corresponding path program 20 times [2020-10-26 19:40:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:29,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078511875] [2020-10-26 19:40:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:29,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:34,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:40:34,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:40:34,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:35,731 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-26 19:40:35,877 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-26 19:40:36,023 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-26 19:40:36,683 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-26 19:40:37,019 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-26 19:40:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:38,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:38,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:38,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:38,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:38,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:38,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:38,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:38,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:38,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:38,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:38,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:38,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078511875] [2020-10-26 19:40:38,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:38,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:40:38,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646285796] [2020-10-26 19:40:38,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:40:38,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:40:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:40:38,374 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 38 states. [2020-10-26 19:40:39,257 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:40:39,547 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:40:39,789 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-26 19:40:40,058 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 19:40:40,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-26 19:40:40,573 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-26 19:40:40,833 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-26 19:40:41,668 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-26 19:40:41,878 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-26 19:40:42,329 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 74 [2020-10-26 19:40:42,578 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 40 [2020-10-26 19:40:42,859 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-26 19:40:43,102 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-26 19:40:43,415 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-26 19:40:43,714 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-26 19:40:43,916 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:40:44,386 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 19:40:44,717 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 19:40:44,912 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-26 19:40:45,717 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2020-10-26 19:40:46,033 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 98