/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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:11:03,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:11:03,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:11:03,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:11:03,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:11:03,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:11:03,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:11:03,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:11:03,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:11:03,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:11:03,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:11:03,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:11:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:11:03,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:11:03,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:11:03,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:11:03,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:11:03,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:11:03,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:11:03,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:11:03,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:11:03,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:11:03,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:11:03,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:11:03,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:11:03,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:11:03,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:11:03,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:11:03,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:11:03,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:11:03,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:11:03,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:11:03,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:11:03,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:11:03,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:11:03,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:11:03,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:11:03,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:11:03,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:11:03,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:11:03,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:11:03,256 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 [2020-10-27 05:11:03,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:11:03,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:11:03,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:11:03,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:11:03,296 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:11:03,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:11:03,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:11:03,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:11:03,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:11:03,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:11:03,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:11:03,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:11:03,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:11:03,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:11:03,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:11:03,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:11:03,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:11:03,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:11:03,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:11:03,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:11:03,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:11:03,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:11:03,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:11:03,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:11:03,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:11:03,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:11:03,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:11:03,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:11:03,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:11:03,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:11:03,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:11:03,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbac1f647/550ac2a205aa4adab9457d8af31141f1/FLAGe5a9a960a [2020-10-27 05:11:04,525 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:11:04,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:11:04,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbac1f647/550ac2a205aa4adab9457d8af31141f1/FLAGe5a9a960a [2020-10-27 05:11:04,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cbac1f647/550ac2a205aa4adab9457d8af31141f1 [2020-10-27 05:11:04,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:11:04,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:11:04,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:04,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:11:04,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:11:04,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:04" (1/1) ... [2020-10-27 05:11:04,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ec7e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:04, skipping insertion in model container [2020-10-27 05:11:04,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:04" (1/1) ... [2020-10-27 05:11:04,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:11:04,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:11:05,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:05,340 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:11:05,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:05,554 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:11:05,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05 WrapperNode [2020-10-27 05:11:05,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:05,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:11:05,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:11:05,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:11:05,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (1/1) ... [2020-10-27 05:11:05,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:11:05,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:11:05,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:11:05,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:11:05,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (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 [2020-10-27 05:11:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:11:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:11:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:11:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:11:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:11:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:11:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:11:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:11:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:11:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:11:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:11:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:11:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:11:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:11:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:11:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:11:05,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:11:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:11:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:11:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:11:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:11:05,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:11:07,344 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:11:07,345 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:11:07,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:07 BoogieIcfgContainer [2020-10-27 05:11:07,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:11:07,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:11:07,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:11:07,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:11:07,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:11:04" (1/3) ... [2020-10-27 05:11:07,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d3a28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:07, skipping insertion in model container [2020-10-27 05:11:07,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:05" (2/3) ... [2020-10-27 05:11:07,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d3a28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:07, skipping insertion in model container [2020-10-27 05:11:07,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:07" (3/3) ... [2020-10-27 05:11:07,365 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:11:07,378 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:11:07,383 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:11:07,395 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:11:07,427 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:11:07,427 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:11:07,427 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:11:07,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:11:07,428 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:11:07,428 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:11:07,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:11:07,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:11:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-27 05:11:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:11:07,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:07,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:07,474 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash -624284439, now seen corresponding path program 1 times [2020-10-27 05:11:07,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703350095] [2020-10-27 05:11:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:08,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:09,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:10,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:11,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:12,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:12,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:12,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:12,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:11:12,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:11:12,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:11:12,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:11:13,504 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:13,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:13,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:13,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:13,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:13,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:11:13,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:13,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:13,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703350095] [2020-10-27 05:11:13,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:13,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:11:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762702410] [2020-10-27 05:11:13,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:11:13,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:11:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:11:13,632 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 13 states. [2020-10-27 05:11:14,426 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 184 [2020-10-27 05:11:17,889 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 184 [2020-10-27 05:11:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:18,856 INFO L93 Difference]: Finished difference Result 592 states and 947 transitions. [2020-10-27 05:11:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:11:18,858 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 05:11:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:18,886 INFO L225 Difference]: With dead ends: 592 [2020-10-27 05:11:18,888 INFO L226 Difference]: Without dead ends: 386 [2020-10-27 05:11:18,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 05:11:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-27 05:11:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-27 05:11:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 05:11:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 349 transitions. [2020-10-27 05:11:18,984 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 349 transitions. Word has length 52 [2020-10-27 05:11:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:18,985 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 349 transitions. [2020-10-27 05:11:18,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:11:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 349 transitions. [2020-10-27 05:11:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:11:18,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:18,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:18,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:11:18,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1975459649, now seen corresponding path program 1 times [2020-10-27 05:11:18,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:18,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122050597] [2020-10-27 05:11:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:19,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:20,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:11:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:24,354 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:24,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:24,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:24,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:11:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:24,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122050597] [2020-10-27 05:11:24,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:24,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:11:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422961028] [2020-10-27 05:11:24,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:11:24,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:24,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:11:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:11:24,449 INFO L87 Difference]: Start difference. First operand 262 states and 349 transitions. Second operand 11 states. [2020-10-27 05:11:24,750 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:11:25,811 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:11:26,132 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:11:26,331 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:27,045 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:11:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:27,102 INFO L93 Difference]: Finished difference Result 596 states and 832 transitions. [2020-10-27 05:11:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:11:27,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:11:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:27,109 INFO L225 Difference]: With dead ends: 596 [2020-10-27 05:11:27,109 INFO L226 Difference]: Without dead ends: 589 [2020-10-27 05:11:27,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:11:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-27 05:11:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 277. [2020-10-27 05:11:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 05:11:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 368 transitions. [2020-10-27 05:11:27,177 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 368 transitions. Word has length 52 [2020-10-27 05:11:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:27,178 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 368 transitions. [2020-10-27 05:11:27,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:11:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 368 transitions. [2020-10-27 05:11:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:11:27,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:27,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:27,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:11:27,191 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 936770437, now seen corresponding path program 1 times [2020-10-27 05:11:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:27,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29373638] [2020-10-27 05:11:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:27,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:30,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:32,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:32,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:11:32,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:11:32,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:11:32,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:32,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:11:32,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:32,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:11:32,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:11:32,901 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:32,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:32,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:32,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:32,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:32,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:11:32,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:32,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:32,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:32,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:32,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29373638] [2020-10-27 05:11:32,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:32,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:11:32,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126546942] [2020-10-27 05:11:32,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:11:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:11:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:11:32,980 INFO L87 Difference]: Start difference. First operand 277 states and 368 transitions. Second operand 15 states. [2020-10-27 05:11:33,586 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2020-10-27 05:11:35,974 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 174 [2020-10-27 05:11:36,599 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 178 [2020-10-27 05:11:37,117 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 175 [2020-10-27 05:11:37,360 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:37,697 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:39,040 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2020-10-27 05:11:39,583 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 178 [2020-10-27 05:11:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:39,660 INFO L93 Difference]: Finished difference Result 994 states and 1416 transitions. [2020-10-27 05:11:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:11:39,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-27 05:11:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:39,670 INFO L225 Difference]: With dead ends: 994 [2020-10-27 05:11:39,670 INFO L226 Difference]: Without dead ends: 898 [2020-10-27 05:11:39,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:11:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-10-27 05:11:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 281. [2020-10-27 05:11:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-27 05:11:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 373 transitions. [2020-10-27 05:11:39,719 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 373 transitions. Word has length 52 [2020-10-27 05:11:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:39,722 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 373 transitions. [2020-10-27 05:11:39,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:11:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 373 transitions. [2020-10-27 05:11:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:39,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:39,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:39,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:11:39,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash -129996473, now seen corresponding path program 1 times [2020-10-27 05:11:39,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:39,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158215667] [2020-10-27 05:11:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:44,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:11:44,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:45,024 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:45,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:45,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:45,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:45,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158215667] [2020-10-27 05:11:45,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:45,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:45,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224591719] [2020-10-27 05:11:45,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:45,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:45,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:45,082 INFO L87 Difference]: Start difference. First operand 281 states and 373 transitions. Second operand 6 states. [2020-10-27 05:11:45,322 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:11:46,084 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:11:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:46,374 INFO L93 Difference]: Finished difference Result 503 states and 689 transitions. [2020-10-27 05:11:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:11:46,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 05:11:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:46,377 INFO L225 Difference]: With dead ends: 503 [2020-10-27 05:11:46,377 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 05:11:46,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 05:11:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 336. [2020-10-27 05:11:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 05:11:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2020-10-27 05:11:46,418 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 463 transitions. Word has length 53 [2020-10-27 05:11:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:46,419 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 463 transitions. [2020-10-27 05:11:46,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 463 transitions. [2020-10-27 05:11:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:46,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:46,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:11:46,421 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 914400266, now seen corresponding path program 1 times [2020-10-27 05:11:46,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:46,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705990029] [2020-10-27 05:11:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:46,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:51,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:51,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:51,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:51,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 05:11:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:11:51,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:51,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:11:51,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:51,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:11:51,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:52,043 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:11:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:52,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:52,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:52,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:11:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705990029] [2020-10-27 05:11:52,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:52,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:11:52,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879861204] [2020-10-27 05:11:52,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:11:52,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:52,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:11:52,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:11:52,113 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 17 states. [2020-10-27 05:11:52,895 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 201 [2020-10-27 05:11:54,957 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:11:55,288 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:11:55,509 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:11:55,804 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:11:56,088 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 05:11:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:57,874 INFO L93 Difference]: Finished difference Result 867 states and 1231 transitions. [2020-10-27 05:11:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 05:11:57,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-27 05:11:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:57,880 INFO L225 Difference]: With dead ends: 867 [2020-10-27 05:11:57,880 INFO L226 Difference]: Without dead ends: 861 [2020-10-27 05:11:57,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 05:11:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-10-27 05:11:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 336. [2020-10-27 05:11:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 05:11:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 462 transitions. [2020-10-27 05:11:57,938 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 462 transitions. Word has length 53 [2020-10-27 05:11:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:57,939 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 462 transitions. [2020-10-27 05:11:57,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:11:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 462 transitions. [2020-10-27 05:11:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:57,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:57,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:57,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:11:57,941 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 13201138, now seen corresponding path program 1 times [2020-10-27 05:11:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:57,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764592821] [2020-10-27 05:11:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:57,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:01,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:02,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:02,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:02,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:12:02,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:12:02,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:12:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:12:02,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:03,301 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:03,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:03,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:03,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:12:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764592821] [2020-10-27 05:12:03,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:03,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:03,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419909125] [2020-10-27 05:12:03,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:12:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:12:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:12:03,395 INFO L87 Difference]: Start difference. First operand 336 states and 462 transitions. Second operand 10 states. [2020-10-27 05:12:03,720 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:12:04,587 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:04,870 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:05,732 INFO L93 Difference]: Finished difference Result 1119 states and 1638 transitions. [2020-10-27 05:12:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:12:05,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 05:12:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:05,738 INFO L225 Difference]: With dead ends: 1119 [2020-10-27 05:12:05,738 INFO L226 Difference]: Without dead ends: 889 [2020-10-27 05:12:05,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:12:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-10-27 05:12:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 517. [2020-10-27 05:12:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-27 05:12:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 736 transitions. [2020-10-27 05:12:05,838 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 736 transitions. Word has length 53 [2020-10-27 05:12:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:05,838 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 736 transitions. [2020-10-27 05:12:05,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:12:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 736 transitions. [2020-10-27 05:12:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:05,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:05,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:05,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:12:05,840 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1599900216, now seen corresponding path program 1 times [2020-10-27 05:12:05,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:05,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733276024] [2020-10-27 05:12:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:05,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:05,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:10,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:10,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:11,320 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:11,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:11,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:11,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:12:11,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:11,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:11,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733276024] [2020-10-27 05:12:11,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:11,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:12:11,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686568054] [2020-10-27 05:12:11,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:12:11,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:12:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:12:11,388 INFO L87 Difference]: Start difference. First operand 517 states and 736 transitions. Second operand 17 states. [2020-10-27 05:12:11,758 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:12:13,379 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:12:13,619 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:12:13,859 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:14,128 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:14,825 INFO L93 Difference]: Finished difference Result 628 states and 868 transitions. [2020-10-27 05:12:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:12:14,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-27 05:12:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:14,832 INFO L225 Difference]: With dead ends: 628 [2020-10-27 05:12:14,832 INFO L226 Difference]: Without dead ends: 623 [2020-10-27 05:12:14,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:12:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-27 05:12:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 521. [2020-10-27 05:12:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-27 05:12:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 742 transitions. [2020-10-27 05:12:14,920 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 742 transitions. Word has length 53 [2020-10-27 05:12:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:14,922 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 742 transitions. [2020-10-27 05:12:14,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:12:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 742 transitions. [2020-10-27 05:12:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:12:14,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:14,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:14,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:12:14,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 708226818, now seen corresponding path program 1 times [2020-10-27 05:12:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:14,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111223991] [2020-10-27 05:12:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:14,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:19,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:12:19,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:19,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:20,309 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:20,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:20,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:20,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:20,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:12:20,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:20,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:20,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:20,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:20,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:20,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111223991] [2020-10-27 05:12:20,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:20,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:12:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286572755] [2020-10-27 05:12:20,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:12:20,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:12:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:12:20,382 INFO L87 Difference]: Start difference. First operand 521 states and 742 transitions. Second operand 13 states. [2020-10-27 05:12:20,981 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 182 [2020-10-27 05:12:22,209 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:12:22,419 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:22,668 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:23,423 INFO L93 Difference]: Finished difference Result 1069 states and 1561 transitions. [2020-10-27 05:12:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:12:23,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-27 05:12:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:23,430 INFO L225 Difference]: With dead ends: 1069 [2020-10-27 05:12:23,430 INFO L226 Difference]: Without dead ends: 1062 [2020-10-27 05:12:23,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:12:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2020-10-27 05:12:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 521. [2020-10-27 05:12:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-27 05:12:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 740 transitions. [2020-10-27 05:12:23,534 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 740 transitions. Word has length 54 [2020-10-27 05:12:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:23,534 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 740 transitions. [2020-10-27 05:12:23,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:12:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 740 transitions. [2020-10-27 05:12:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:12:23,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:23,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:23,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:12:23,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash 100251096, now seen corresponding path program 1 times [2020-10-27 05:12:23,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:23,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34214823] [2020-10-27 05:12:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:23,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:12:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:28,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:12:28,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:28,966 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:28,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:28,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:28,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:28,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34214823] [2020-10-27 05:12:29,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:29,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:12:29,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939717642] [2020-10-27 05:12:29,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:12:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:12:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:12:29,015 INFO L87 Difference]: Start difference. First operand 521 states and 740 transitions. Second operand 14 states. [2020-10-27 05:12:29,381 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:12:30,646 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:12:30,868 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:31,125 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:31,751 INFO L93 Difference]: Finished difference Result 571 states and 787 transitions. [2020-10-27 05:12:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:12:31,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 05:12:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:31,764 INFO L225 Difference]: With dead ends: 571 [2020-10-27 05:12:31,764 INFO L226 Difference]: Without dead ends: 563 [2020-10-27 05:12:31,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:12:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-10-27 05:12:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 521. [2020-10-27 05:12:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-27 05:12:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 738 transitions. [2020-10-27 05:12:31,851 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 738 transitions. Word has length 54 [2020-10-27 05:12:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 738 transitions. [2020-10-27 05:12:31,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:12:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 738 transitions. [2020-10-27 05:12:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:31,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:31,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:12:31,852 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash -566053731, now seen corresponding path program 1 times [2020-10-27 05:12:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:31,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163296521] [2020-10-27 05:12:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:31,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:34,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:12:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:12:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:34,647 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:34,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:34,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163296521] [2020-10-27 05:12:34,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:34,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:12:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93881330] [2020-10-27 05:12:34,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:12:34,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:12:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:12:34,685 INFO L87 Difference]: Start difference. First operand 521 states and 738 transitions. Second operand 13 states. [2020-10-27 05:12:35,002 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:12:36,493 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:12:36,750 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:37,246 INFO L93 Difference]: Finished difference Result 549 states and 763 transitions. [2020-10-27 05:12:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:12:37,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 05:12:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:37,250 INFO L225 Difference]: With dead ends: 549 [2020-10-27 05:12:37,250 INFO L226 Difference]: Without dead ends: 544 [2020-10-27 05:12:37,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:12:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-27 05:12:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 514. [2020-10-27 05:12:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-27 05:12:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 729 transitions. [2020-10-27 05:12:37,361 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 729 transitions. Word has length 55 [2020-10-27 05:12:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:37,361 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 729 transitions. [2020-10-27 05:12:37,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:12:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 729 transitions. [2020-10-27 05:12:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:37,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:37,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:12:37,363 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1612030871, now seen corresponding path program 1 times [2020-10-27 05:12:37,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:37,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355182658] [2020-10-27 05:12:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:37,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:39,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:12:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:40,248 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 05:12:40,603 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:40,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:40,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:40,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:40,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:12:40,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:40,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:40,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355182658] [2020-10-27 05:12:40,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:40,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:12:40,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099876189] [2020-10-27 05:12:40,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:40,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:12:40,652 INFO L87 Difference]: Start difference. First operand 514 states and 729 transitions. Second operand 15 states. [2020-10-27 05:12:40,834 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-27 05:12:41,574 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 228 [2020-10-27 05:12:42,007 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-27 05:12:43,351 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:12:43,652 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:12:43,957 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:12:44,240 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:44,915 INFO L93 Difference]: Finished difference Result 943 states and 1364 transitions. [2020-10-27 05:12:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:12:44,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-27 05:12:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:44,925 INFO L225 Difference]: With dead ends: 943 [2020-10-27 05:12:44,925 INFO L226 Difference]: Without dead ends: 775 [2020-10-27 05:12:44,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:12:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-27 05:12:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 512. [2020-10-27 05:12:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-10-27 05:12:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 725 transitions. [2020-10-27 05:12:45,023 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 725 transitions. Word has length 55 [2020-10-27 05:12:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:45,023 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 725 transitions. [2020-10-27 05:12:45,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:12:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 725 transitions. [2020-10-27 05:12:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:45,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:45,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:12:45,025 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1834091247, now seen corresponding path program 1 times [2020-10-27 05:12:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:45,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132931926] [2020-10-27 05:12:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:12:47,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:47,409 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:12:47,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:47,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:12:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:12:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132931926] [2020-10-27 05:12:47,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:47,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:12:47,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606950653] [2020-10-27 05:12:47,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:47,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:47,456 INFO L87 Difference]: Start difference. First operand 512 states and 725 transitions. Second operand 9 states. [2020-10-27 05:12:47,707 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:48,413 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:12:48,656 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:49,330 INFO L93 Difference]: Finished difference Result 1179 states and 1759 transitions. [2020-10-27 05:12:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:49,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 05:12:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:49,335 INFO L225 Difference]: With dead ends: 1179 [2020-10-27 05:12:49,335 INFO L226 Difference]: Without dead ends: 842 [2020-10-27 05:12:49,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-10-27 05:12:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 502. [2020-10-27 05:12:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-27 05:12:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 712 transitions. [2020-10-27 05:12:49,445 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 712 transitions. Word has length 55 [2020-10-27 05:12:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:49,445 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 712 transitions. [2020-10-27 05:12:49,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 712 transitions. [2020-10-27 05:12:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:12:49,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:49,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:49,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:12:49,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2011836099, now seen corresponding path program 1 times [2020-10-27 05:12:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624027606] [2020-10-27 05:12:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2216 [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:12:51,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:52,189 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:52,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:52,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:52,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:52,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:52,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624027606] [2020-10-27 05:12:52,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:52,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209491460] [2020-10-27 05:12:52,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:52,248 INFO L87 Difference]: Start difference. First operand 502 states and 712 transitions. Second operand 11 states. [2020-10-27 05:12:52,855 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2020-10-27 05:12:54,096 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:54,384 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:12:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:55,948 INFO L93 Difference]: Finished difference Result 1366 states and 1982 transitions. [2020-10-27 05:12:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:12:55,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:12:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:55,955 INFO L225 Difference]: With dead ends: 1366 [2020-10-27 05:12:55,955 INFO L226 Difference]: Without dead ends: 1177 [2020-10-27 05:12:55,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:12:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2020-10-27 05:12:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 506. [2020-10-27 05:12:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-27 05:12:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 716 transitions. [2020-10-27 05:12:56,092 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 716 transitions. Word has length 56 [2020-10-27 05:12:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:56,092 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 716 transitions. [2020-10-27 05:12:56,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 716 transitions. [2020-10-27 05:12:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:12:56,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:56,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:12:56,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:12:56,094 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2128026737, now seen corresponding path program 1 times [2020-10-27 05:12:56,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:56,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28695426] [2020-10-27 05:12:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:56,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:58,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:12:58,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:12:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2409 [2020-10-27 05:12:58,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:58,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:58,868 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:58,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:58,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:58,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:58,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28695426] [2020-10-27 05:12:58,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:58,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:58,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728090986] [2020-10-27 05:12:58,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:58,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:58,920 INFO L87 Difference]: Start difference. First operand 506 states and 716 transitions. Second operand 12 states. [2020-10-27 05:12:59,229 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:13:00,475 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:13:00,823 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:13:02,393 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:13:02,700 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:03,116 INFO L93 Difference]: Finished difference Result 1813 states and 2683 transitions. [2020-10-27 05:13:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:13:03,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-27 05:13:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:03,124 INFO L225 Difference]: With dead ends: 1813 [2020-10-27 05:13:03,125 INFO L226 Difference]: Without dead ends: 1805 [2020-10-27 05:13:03,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:13:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-10-27 05:13:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 506. [2020-10-27 05:13:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-27 05:13:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 715 transitions. [2020-10-27 05:13:03,267 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 715 transitions. Word has length 56 [2020-10-27 05:13:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:03,268 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 715 transitions. [2020-10-27 05:13:03,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 715 transitions. [2020-10-27 05:13:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:03,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:03,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:03,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:13:03,269 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash -415900144, now seen corresponding path program 1 times [2020-10-27 05:13:03,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:03,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486350572] [2020-10-27 05:13:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:03,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:08,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:08,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:13:08,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:08,603 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-10-27 05:13:08,788 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-10-27 05:13:08,938 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-27 05:13:09,061 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-27 05:13:09,723 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:09,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:09,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:09,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:09,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:09,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:09,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:09,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486350572] [2020-10-27 05:13:09,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:09,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:13:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636902909] [2020-10-27 05:13:09,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:13:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:13:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:13:09,769 INFO L87 Difference]: Start difference. First operand 506 states and 715 transitions. Second operand 16 states. [2020-10-27 05:13:10,454 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 180 [2020-10-27 05:13:10,847 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 05:13:11,064 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-27 05:13:11,237 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-27 05:13:11,422 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-27 05:13:13,031 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 173 [2020-10-27 05:13:13,299 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:13,894 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 179 [2020-10-27 05:13:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:14,570 INFO L93 Difference]: Finished difference Result 933 states and 1345 transitions. [2020-10-27 05:13:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:13:14,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-27 05:13:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:14,574 INFO L225 Difference]: With dead ends: 933 [2020-10-27 05:13:14,574 INFO L226 Difference]: Without dead ends: 595 [2020-10-27 05:13:14,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:13:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-27 05:13:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 502. [2020-10-27 05:13:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-27 05:13:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 708 transitions. [2020-10-27 05:13:14,699 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 708 transitions. Word has length 56 [2020-10-27 05:13:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:14,699 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 708 transitions. [2020-10-27 05:13:14,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:13:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 708 transitions. [2020-10-27 05:13:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:14,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:14,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:14,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:13:14,701 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:14,701 INFO L82 PathProgramCache]: Analyzing trace with hash -322988547, now seen corresponding path program 1 times [2020-10-27 05:13:14,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:14,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168406023] [2020-10-27 05:13:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:16,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:16,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:13:16,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,176 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:17,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:17,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:17,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:17,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:13:17,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:17,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:17,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:17,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:17,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:17,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168406023] [2020-10-27 05:13:17,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:17,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332712828] [2020-10-27 05:13:17,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:17,254 INFO L87 Difference]: Start difference. First operand 502 states and 708 transitions. Second operand 11 states. [2020-10-27 05:13:17,875 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2020-10-27 05:13:19,281 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2020-10-27 05:13:19,550 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:20,022 INFO L93 Difference]: Finished difference Result 715 states and 1012 transitions. [2020-10-27 05:13:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:13:20,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:13:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:20,026 INFO L225 Difference]: With dead ends: 715 [2020-10-27 05:13:20,026 INFO L226 Difference]: Without dead ends: 706 [2020-10-27 05:13:20,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:13:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-10-27 05:13:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 505. [2020-10-27 05:13:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-27 05:13:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 711 transitions. [2020-10-27 05:13:20,152 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 711 transitions. Word has length 56 [2020-10-27 05:13:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:20,153 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 711 transitions. [2020-10-27 05:13:20,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 711 transitions. [2020-10-27 05:13:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:20,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:20,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:20,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:13:20,154 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash 738110924, now seen corresponding path program 1 times [2020-10-27 05:13:20,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:20,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82682733] [2020-10-27 05:13:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:22,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:22,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2632 [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:22,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:23,120 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:23,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:23,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:23,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:23,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82682733] [2020-10-27 05:13:23,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:23,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:23,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141198649] [2020-10-27 05:13:23,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:23,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:23,172 INFO L87 Difference]: Start difference. First operand 505 states and 711 transitions. Second operand 10 states. [2020-10-27 05:13:23,487 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:13:24,344 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:24,600 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:25,057 INFO L93 Difference]: Finished difference Result 898 states and 1291 transitions. [2020-10-27 05:13:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:13:25,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 05:13:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:25,061 INFO L225 Difference]: With dead ends: 898 [2020-10-27 05:13:25,061 INFO L226 Difference]: Without dead ends: 528 [2020-10-27 05:13:25,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:13:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-27 05:13:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 501. [2020-10-27 05:13:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-27 05:13:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 705 transitions. [2020-10-27 05:13:25,180 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 705 transitions. Word has length 57 [2020-10-27 05:13:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:25,181 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 705 transitions. [2020-10-27 05:13:25,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 705 transitions. [2020-10-27 05:13:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:25,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:25,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:25,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:13:25,182 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -608292584, now seen corresponding path program 1 times [2020-10-27 05:13:25,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:25,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395251926] [2020-10-27 05:13:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2540 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:28,055 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:28,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:28,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:28,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:28,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395251926] [2020-10-27 05:13:28,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:28,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523170188] [2020-10-27 05:13:28,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:28,098 INFO L87 Difference]: Start difference. First operand 501 states and 705 transitions. Second operand 10 states. [2020-10-27 05:13:28,391 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:29,272 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:29,507 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:30,554 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:30,648 INFO L93 Difference]: Finished difference Result 705 states and 1000 transitions. [2020-10-27 05:13:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:13:30,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 05:13:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:30,652 INFO L225 Difference]: With dead ends: 705 [2020-10-27 05:13:30,652 INFO L226 Difference]: Without dead ends: 697 [2020-10-27 05:13:30,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:13:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-27 05:13:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 501. [2020-10-27 05:13:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-27 05:13:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 704 transitions. [2020-10-27 05:13:30,766 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 704 transitions. Word has length 57 [2020-10-27 05:13:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:30,766 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 704 transitions. [2020-10-27 05:13:30,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 704 transitions. [2020-10-27 05:13:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:30,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:30,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:30,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:13:30,767 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash -97823409, now seen corresponding path program 1 times [2020-10-27 05:13:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:30,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422358434] [2020-10-27 05:13:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:30,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2487 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:33,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:13:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,558 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:33,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422358434] [2020-10-27 05:13:33,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:33,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463460670] [2020-10-27 05:13:33,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:33,595 INFO L87 Difference]: Start difference. First operand 501 states and 704 transitions. Second operand 9 states. [2020-10-27 05:13:33,907 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:34,661 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:34,907 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:35,303 INFO L93 Difference]: Finished difference Result 773 states and 1115 transitions. [2020-10-27 05:13:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:35,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:13:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:35,305 INFO L225 Difference]: With dead ends: 773 [2020-10-27 05:13:35,305 INFO L226 Difference]: Without dead ends: 390 [2020-10-27 05:13:35,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-27 05:13:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2020-10-27 05:13:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 05:13:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 397 transitions. [2020-10-27 05:13:35,378 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 397 transitions. Word has length 57 [2020-10-27 05:13:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:35,378 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 397 transitions. [2020-10-27 05:13:35,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 397 transitions. [2020-10-27 05:13:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:35,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:35,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:13:35,379 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1756918882, now seen corresponding path program 1 times [2020-10-27 05:13:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:35,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386261703] [2020-10-27 05:13:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:36,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:36,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:36,782 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:36,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:36,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:36,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386261703] [2020-10-27 05:13:36,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:36,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:36,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020909100] [2020-10-27 05:13:36,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:36,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:36,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:36,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:36,827 INFO L87 Difference]: Start difference. First operand 291 states and 397 transitions. Second operand 9 states. [2020-10-27 05:13:37,082 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:37,851 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:38,326 INFO L93 Difference]: Finished difference Result 303 states and 407 transitions. [2020-10-27 05:13:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:38,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:13:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:38,329 INFO L225 Difference]: With dead ends: 303 [2020-10-27 05:13:38,329 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 05:13:38,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:13:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 05:13:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-10-27 05:13:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 05:13:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 390 transitions. [2020-10-27 05:13:38,390 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 390 transitions. Word has length 58 [2020-10-27 05:13:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:38,391 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 390 transitions. [2020-10-27 05:13:38,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 390 transitions. [2020-10-27 05:13:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:38,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:38,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:38,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:13:38,392 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1331631480, now seen corresponding path program 1 times [2020-10-27 05:13:38,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:38,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084152953] [2020-10-27 05:13:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:38,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:39,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:39,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:13:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:39,947 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:39,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:39,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:39,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:39,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:39,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:13:39,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:39,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:39,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:39,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084152953] [2020-10-27 05:13:39,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:39,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:39,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888874014] [2020-10-27 05:13:39,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:39,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:39,990 INFO L87 Difference]: Start difference. First operand 286 states and 390 transitions. Second operand 9 states. [2020-10-27 05:13:40,355 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-27 05:13:41,206 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:13:41,746 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:13:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:41,754 INFO L93 Difference]: Finished difference Result 290 states and 392 transitions. [2020-10-27 05:13:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:41,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:13:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:41,757 INFO L225 Difference]: With dead ends: 290 [2020-10-27 05:13:41,757 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 05:13:41,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:13:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 05:13:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2020-10-27 05:13:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:13:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 377 transitions. [2020-10-27 05:13:41,831 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 377 transitions. Word has length 58 [2020-10-27 05:13:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:41,831 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 377 transitions. [2020-10-27 05:13:41,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 377 transitions. [2020-10-27 05:13:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:41,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:41,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:13:41,833 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2082495274, now seen corresponding path program 1 times [2020-10-27 05:13:41,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:41,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198806020] [2020-10-27 05:13:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 05:13:42,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:43,082 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:43,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:43,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:43,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:43,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:43,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198806020] [2020-10-27 05:13:43,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:43,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188286101] [2020-10-27 05:13:43,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:13:43,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:43,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:13:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:43,119 INFO L87 Difference]: Start difference. First operand 275 states and 377 transitions. Second operand 8 states. [2020-10-27 05:13:43,358 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:44,156 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:13:44,401 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:44,425 INFO L93 Difference]: Finished difference Result 362 states and 509 transitions. [2020-10-27 05:13:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:44,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-27 05:13:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:44,429 INFO L225 Difference]: With dead ends: 362 [2020-10-27 05:13:44,429 INFO L226 Difference]: Without dead ends: 338 [2020-10-27 05:13:44,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:13:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-27 05:13:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 253. [2020-10-27 05:13:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 05:13:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 352 transitions. [2020-10-27 05:13:44,477 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 352 transitions. Word has length 58 [2020-10-27 05:13:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:44,477 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 352 transitions. [2020-10-27 05:13:44,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:13:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 352 transitions. [2020-10-27 05:13:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:13:44,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:44,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:44,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:13:44,478 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash 500515459, now seen corresponding path program 1 times [2020-10-27 05:13:44,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:44,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376552946] [2020-10-27 05:13:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:44,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:49,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:13:49,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:13:49,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:49,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:49,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:13:49,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:49,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:49,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:49,812 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:49,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:49,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:49,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:13:49,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:49,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376552946] [2020-10-27 05:13:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:13:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597831741] [2020-10-27 05:13:49,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:13:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:13:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:49,855 INFO L87 Difference]: Start difference. First operand 253 states and 352 transitions. Second operand 10 states. [2020-10-27 05:13:50,148 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:51,412 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:51,697 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:51,933 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:52,006 INFO L93 Difference]: Finished difference Result 525 states and 763 transitions. [2020-10-27 05:13:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:13:52,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:13:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:52,008 INFO L225 Difference]: With dead ends: 525 [2020-10-27 05:13:52,008 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 05:13:52,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:13:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 05:13:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 253. [2020-10-27 05:13:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 05:13:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 350 transitions. [2020-10-27 05:13:52,057 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 350 transitions. Word has length 76 [2020-10-27 05:13:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:52,057 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 350 transitions. [2020-10-27 05:13:52,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:13:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 350 transitions. [2020-10-27 05:13:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:13:52,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:52,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:13:52,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:13:52,059 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1209094814, now seen corresponding path program 1 times [2020-10-27 05:13:52,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:52,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318271269] [2020-10-27 05:13:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:52,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:53,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:57,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:13:57,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:13:57,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:13:57,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:13:57,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:57,459 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:57,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:57,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:57,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:57,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318271269] [2020-10-27 05:13:57,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:57,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596558387] [2020-10-27 05:13:57,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:57,509 INFO L87 Difference]: Start difference. First operand 253 states and 350 transitions. Second operand 12 states. [2020-10-27 05:13:58,149 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 183 [2020-10-27 05:13:59,891 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:00,145 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:00,245 INFO L93 Difference]: Finished difference Result 1115 states and 1643 transitions. [2020-10-27 05:14:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:14:00,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-27 05:14:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:00,249 INFO L225 Difference]: With dead ends: 1115 [2020-10-27 05:14:00,249 INFO L226 Difference]: Without dead ends: 950 [2020-10-27 05:14:00,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:14:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-10-27 05:14:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 436. [2020-10-27 05:14:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-27 05:14:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 621 transitions. [2020-10-27 05:14:00,373 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 621 transitions. Word has length 78 [2020-10-27 05:14:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:00,373 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 621 transitions. [2020-10-27 05:14:00,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:14:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 621 transitions. [2020-10-27 05:14:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:14:00,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:00,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:00,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:14:00,375 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:00,375 INFO L82 PathProgramCache]: Analyzing trace with hash 68743103, now seen corresponding path program 1 times [2020-10-27 05:14:00,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:00,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629463690] [2020-10-27 05:14:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:00,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:14:05,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,089 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:06,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:06,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:06,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629463690] [2020-10-27 05:14:06,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:06,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:06,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127880313] [2020-10-27 05:14:06,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:06,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:06,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:06,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:06,127 INFO L87 Difference]: Start difference. First operand 436 states and 621 transitions. Second operand 15 states. [2020-10-27 05:14:06,282 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-27 05:14:06,999 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 214 [2020-10-27 05:14:08,756 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:14:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:08,810 INFO L93 Difference]: Finished difference Result 767 states and 1134 transitions. [2020-10-27 05:14:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:14:08,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-27 05:14:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:08,815 INFO L225 Difference]: With dead ends: 767 [2020-10-27 05:14:08,815 INFO L226 Difference]: Without dead ends: 597 [2020-10-27 05:14:08,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:14:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-27 05:14:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 429. [2020-10-27 05:14:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 05:14:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 613 transitions. [2020-10-27 05:14:08,911 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 613 transitions. Word has length 78 [2020-10-27 05:14:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:08,912 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 613 transitions. [2020-10-27 05:14:08,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:14:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 613 transitions. [2020-10-27 05:14:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:14:08,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:08,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:08,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:14:08,914 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1428269320, now seen corresponding path program 1 times [2020-10-27 05:14:08,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:08,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403617941] [2020-10-27 05:14:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:10,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:14:10,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:10,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-27 05:14:10,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:14:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:14:10,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,518 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:10,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:10,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:10,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:10,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:10,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:10,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403617941] [2020-10-27 05:14:10,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:10,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:10,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883138066] [2020-10-27 05:14:10,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:10,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:10,549 INFO L87 Difference]: Start difference. First operand 429 states and 613 transitions. Second operand 6 states. [2020-10-27 05:14:10,792 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:11,632 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:14:11,837 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:14:12,126 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:14:12,372 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:14:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:12,636 INFO L93 Difference]: Finished difference Result 2367 states and 3625 transitions. [2020-10-27 05:14:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:14:12,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-27 05:14:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:12,644 INFO L225 Difference]: With dead ends: 2367 [2020-10-27 05:14:12,645 INFO L226 Difference]: Without dead ends: 2044 [2020-10-27 05:14:12,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:14:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-27 05:14:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 749. [2020-10-27 05:14:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-10-27 05:14:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1097 transitions. [2020-10-27 05:14:12,856 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1097 transitions. Word has length 79 [2020-10-27 05:14:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:12,857 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 1097 transitions. [2020-10-27 05:14:12,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1097 transitions. [2020-10-27 05:14:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:12,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:12,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:12,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 05:14:12,859 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1268097800, now seen corresponding path program 1 times [2020-10-27 05:14:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:12,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478805509] [2020-10-27 05:14:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:14,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:14,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:14:14,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-27 05:14:14,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:14:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:14:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:14:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:14,327 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:14,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:14,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:14,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478805509] [2020-10-27 05:14:14,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:14,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:14:14,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634150476] [2020-10-27 05:14:14,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:14:14,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:14:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:14:14,394 INFO L87 Difference]: Start difference. First operand 749 states and 1097 transitions. Second operand 5 states. [2020-10-27 05:14:14,719 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:15,677 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:15,806 INFO L93 Difference]: Finished difference Result 1947 states and 2917 transitions. [2020-10-27 05:14:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:14:15,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 05:14:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:15,812 INFO L225 Difference]: With dead ends: 1947 [2020-10-27 05:14:15,812 INFO L226 Difference]: Without dead ends: 1304 [2020-10-27 05:14:15,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-10-27 05:14:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1285. [2020-10-27 05:14:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-10-27 05:14:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1873 transitions. [2020-10-27 05:14:16,163 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1873 transitions. Word has length 81 [2020-10-27 05:14:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:16,164 INFO L481 AbstractCegarLoop]: Abstraction has 1285 states and 1873 transitions. [2020-10-27 05:14:16,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:14:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1873 transitions. [2020-10-27 05:14:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:16,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:16,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:16,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 05:14:16,166 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 793201072, now seen corresponding path program 1 times [2020-10-27 05:14:16,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:16,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793793603] [2020-10-27 05:14:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:16,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:17,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:14:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:14:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:17,595 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:17,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:17,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:17,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:17,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:17,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793793603] [2020-10-27 05:14:17,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:17,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857068233] [2020-10-27 05:14:17,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:17,629 INFO L87 Difference]: Start difference. First operand 1285 states and 1873 transitions. Second operand 6 states. [2020-10-27 05:14:17,919 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:18,923 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:19,142 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:14:19,453 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:14:19,700 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:20,118 INFO L93 Difference]: Finished difference Result 4295 states and 6389 transitions. [2020-10-27 05:14:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:14:20,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:14:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:20,130 INFO L225 Difference]: With dead ends: 4295 [2020-10-27 05:14:20,130 INFO L226 Difference]: Without dead ends: 3116 [2020-10-27 05:14:20,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:14:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2020-10-27 05:14:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1285. [2020-10-27 05:14:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-10-27 05:14:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1857 transitions. [2020-10-27 05:14:20,528 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1857 transitions. Word has length 81 [2020-10-27 05:14:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:20,528 INFO L481 AbstractCegarLoop]: Abstraction has 1285 states and 1857 transitions. [2020-10-27 05:14:20,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:14:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1857 transitions. [2020-10-27 05:14:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:20,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:20,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:20,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 05:14:20,532 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:20,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1381844479, now seen corresponding path program 1 times [2020-10-27 05:14:20,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:20,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355668099] [2020-10-27 05:14:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:21,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:25,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:14:25,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:14:25,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:14:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,881 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:25,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:25,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:25,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:25,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355668099] [2020-10-27 05:14:25,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:25,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:25,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156884342] [2020-10-27 05:14:25,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:25,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:25,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:25,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:25,925 INFO L87 Difference]: Start difference. First operand 1285 states and 1857 transitions. Second operand 10 states. [2020-10-27 05:14:26,446 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 172 [2020-10-27 05:14:28,184 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:14:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:29,843 INFO L93 Difference]: Finished difference Result 7207 states and 10565 transitions. [2020-10-27 05:14:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:14:29,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-27 05:14:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:29,866 INFO L225 Difference]: With dead ends: 7207 [2020-10-27 05:14:29,866 INFO L226 Difference]: Without dead ends: 6028 [2020-10-27 05:14:29,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:14:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2020-10-27 05:14:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 1673. [2020-10-27 05:14:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1673 states. [2020-10-27 05:14:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2451 transitions. [2020-10-27 05:14:30,425 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2451 transitions. Word has length 81 [2020-10-27 05:14:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 1673 states and 2451 transitions. [2020-10-27 05:14:30,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2451 transitions. [2020-10-27 05:14:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:14:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:30,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:30,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 05:14:30,429 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1037973505, now seen corresponding path program 1 times [2020-10-27 05:14:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546561465] [2020-10-27 05:14:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:31,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:14:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:14:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,819 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:35,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:35,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:35,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:35,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546561465] [2020-10-27 05:14:35,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:35,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:14:35,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761727846] [2020-10-27 05:14:35,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:14:35,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:35,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:14:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:35,864 INFO L87 Difference]: Start difference. First operand 1673 states and 2451 transitions. Second operand 8 states. [2020-10-27 05:14:36,095 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:37,168 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:37,425 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:38,820 INFO L93 Difference]: Finished difference Result 5781 states and 8521 transitions. [2020-10-27 05:14:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:14:38,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-10-27 05:14:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:38,827 INFO L225 Difference]: With dead ends: 5781 [2020-10-27 05:14:38,828 INFO L226 Difference]: Without dead ends: 4374 [2020-10-27 05:14:38,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:14:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2020-10-27 05:14:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 2297. [2020-10-27 05:14:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2297 states. [2020-10-27 05:14:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3337 transitions. [2020-10-27 05:14:39,516 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3337 transitions. Word has length 81 [2020-10-27 05:14:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:39,516 INFO L481 AbstractCegarLoop]: Abstraction has 2297 states and 3337 transitions. [2020-10-27 05:14:39,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:14:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3337 transitions. [2020-10-27 05:14:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:14:39,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:39,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:39,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 05:14:39,519 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash 606922634, now seen corresponding path program 1 times [2020-10-27 05:14:39,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:39,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323661876] [2020-10-27 05:14:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:39,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:41,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:14:41,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:14:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:41,611 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323661876] [2020-10-27 05:14:41,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:41,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:14:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089016492] [2020-10-27 05:14:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:14:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:14:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:14:41,641 INFO L87 Difference]: Start difference. First operand 2297 states and 3337 transitions. Second operand 6 states. [2020-10-27 05:14:41,903 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 167