/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:42:09,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:42:09,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:42:09,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:42:09,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:42:09,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:42:09,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:42:09,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:42:09,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:42:09,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:42:09,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:42:09,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:42:09,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:42:09,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:42:09,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:42:09,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:42:09,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:42:09,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:42:09,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:42:09,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:42:09,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:42:09,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:42:09,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:42:09,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:42:09,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:42:09,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:42:09,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:42:09,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:42:09,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:42:09,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:42:09,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:42:09,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:42:09,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:42:09,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:42:09,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:42:09,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:42:09,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:42:09,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:42:09,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:42:09,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:42:09,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:42:09,134 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 23:42:09,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:42:09,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:42:09,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:42:09,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:42:09,188 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:42:09,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:42:09,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:42:09,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:42:09,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:42:09,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:42:09,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:42:09,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:42:09,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:42:09,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:42:09,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:42:09,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:42:09,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:42:09,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:42:09,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:42:09,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:42:09,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:42:09,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:42:09,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:42:09,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:42:09,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:42:09,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:42:09,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:42:09,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:42:09,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:42:09,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:42:09,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:42:09,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:42:09,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:42:09,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:42:09,601 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:42:09,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:42:09,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba52fb5a3/9bfe9a7ca27a4bb0a81c855eab726486/FLAGd87fad7da [2020-10-27 23:42:10,394 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:42:10,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:42:10,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba52fb5a3/9bfe9a7ca27a4bb0a81c855eab726486/FLAGd87fad7da [2020-10-27 23:42:10,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba52fb5a3/9bfe9a7ca27a4bb0a81c855eab726486 [2020-10-27 23:42:10,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:42:10,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:42:10,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:42:10,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:42:10,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:42:10,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:42:10" (1/1) ... [2020-10-27 23:42:10,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151f1b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:10, skipping insertion in model container [2020-10-27 23:42:10,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:42:10" (1/1) ... [2020-10-27 23:42:10,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:42:10,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:42:11,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:42:11,079 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:42:11,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:42:11,174 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:42:11,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11 WrapperNode [2020-10-27 23:42:11,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:42:11,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:42:11,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:42:11,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:42:11,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... [2020-10-27 23:42:11,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:42:11,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:42:11,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:42:11,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:42:11,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:42:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:42:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:42:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:42:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:42:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:42:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:42:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:42:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:42:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:42:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:42:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:42:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:42:12,114 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:42:12,114 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:42:12,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:42:12 BoogieIcfgContainer [2020-10-27 23:42:12,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:42:12,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:42:12,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:42:12,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:42:12,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:42:10" (1/3) ... [2020-10-27 23:42:12,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:42:12, skipping insertion in model container [2020-10-27 23:42:12,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:42:11" (2/3) ... [2020-10-27 23:42:12,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:42:12, skipping insertion in model container [2020-10-27 23:42:12,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:42:12" (3/3) ... [2020-10-27 23:42:12,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:42:12,140 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:42:12,146 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:42:12,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:42:12,190 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:42:12,190 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:42:12,190 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:42:12,190 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:42:12,191 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:42:12,191 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:42:12,191 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:42:12,191 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:42:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-27 23:42:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:42:12,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:12,221 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 23:42:12,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-27 23:42:12,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:12,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113685761] [2020-10-27 23:42:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:12,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:17,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:42:17,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:42:17,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:42:17,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:42:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:42:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 23:42:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:42:17,830 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:17,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:17,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:17,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:17,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:42:17,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:17,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:17,881 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 23:42:17,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113685761] [2020-10-27 23:42:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:17,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:17,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765773087] [2020-10-27 23:42:17,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:17,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:17,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:17,910 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-27 23:42:18,127 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:42:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:18,949 INFO L93 Difference]: Finished difference Result 227 states and 365 transitions. [2020-10-27 23:42:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:42:18,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 23:42:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:18,964 INFO L225 Difference]: With dead ends: 227 [2020-10-27 23:42:18,965 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 23:42:18,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 23:42:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2020-10-27 23:42:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 23:42:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 227 transitions. [2020-10-27 23:42:19,037 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 227 transitions. Word has length 52 [2020-10-27 23:42:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:19,038 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 227 transitions. [2020-10-27 23:42:19,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:42:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 227 transitions. [2020-10-27 23:42:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:19,041 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 23:42:19,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:42:19,041 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:19,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1128688483, now seen corresponding path program 1 times [2020-10-27 23:42:19,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:19,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780368756] [2020-10-27 23:42:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:24,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:42:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:42:24,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:42:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:42:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:42:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:24,341 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:24,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:24,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:24,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:24,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:24,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:24,387 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 23:42:24,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780368756] [2020-10-27 23:42:24,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:24,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126684265] [2020-10-27 23:42:24,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:24,395 INFO L87 Difference]: Start difference. First operand 160 states and 227 transitions. Second operand 4 states. [2020-10-27 23:42:24,580 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:42:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:25,191 INFO L93 Difference]: Finished difference Result 252 states and 366 transitions. [2020-10-27 23:42:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:42:25,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 23:42:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:25,199 INFO L225 Difference]: With dead ends: 252 [2020-10-27 23:42:25,199 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 23:42:25,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 23:42:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-27 23:42:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 23:42:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2020-10-27 23:42:25,247 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 53 [2020-10-27 23:42:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:25,248 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2020-10-27 23:42:25,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:42:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2020-10-27 23:42:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:25,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:25,252 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 23:42:25,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:42:25,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash -95828956, now seen corresponding path program 1 times [2020-10-27 23:42:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:25,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867262207] [2020-10-27 23:42:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:30,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:30,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:42:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:42:30,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:42:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:30,621 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-10-27 23:42:30,836 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:30,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:30,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:30,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:30,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:30,876 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 23:42:30,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867262207] [2020-10-27 23:42:30,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:30,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973806541] [2020-10-27 23:42:30,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:30,881 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand 10 states. [2020-10-27 23:42:31,119 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:31,872 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:42:33,031 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:33,174 INFO L93 Difference]: Finished difference Result 681 states and 1002 transitions. [2020-10-27 23:42:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 23:42:33,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:42:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:33,179 INFO L225 Difference]: With dead ends: 681 [2020-10-27 23:42:33,179 INFO L226 Difference]: Without dead ends: 574 [2020-10-27 23:42:33,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:42:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-27 23:42:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 179. [2020-10-27 23:42:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 23:42:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 246 transitions. [2020-10-27 23:42:33,210 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 246 transitions. Word has length 54 [2020-10-27 23:42:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:33,211 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 246 transitions. [2020-10-27 23:42:33,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 246 transitions. [2020-10-27 23:42:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:33,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:33,213 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 23:42:33,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:42:33,213 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:33,214 INFO L82 PathProgramCache]: Analyzing trace with hash 464608014, now seen corresponding path program 1 times [2020-10-27 23:42:33,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:33,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712714136] [2020-10-27 23:42:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:33,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:38,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:38,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:42:38,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:42:38,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:38,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:42:38,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:38,449 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:38,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:38,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:38,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:38,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:38,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:42:38,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:38,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:38,488 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 23:42:38,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712714136] [2020-10-27 23:42:38,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:38,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636805302] [2020-10-27 23:42:38,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:38,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:38,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:38,492 INFO L87 Difference]: Start difference. First operand 179 states and 246 transitions. Second operand 6 states. [2020-10-27 23:42:38,695 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:39,222 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:39,436 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:40,236 INFO L93 Difference]: Finished difference Result 924 states and 1370 transitions. [2020-10-27 23:42:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:40,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:42:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:40,251 INFO L225 Difference]: With dead ends: 924 [2020-10-27 23:42:40,251 INFO L226 Difference]: Without dead ends: 831 [2020-10-27 23:42:40,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-10-27 23:42:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 466. [2020-10-27 23:42:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 23:42:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 681 transitions. [2020-10-27 23:42:40,313 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 681 transitions. Word has length 54 [2020-10-27 23:42:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:40,314 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 681 transitions. [2020-10-27 23:42:40,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 681 transitions. [2020-10-27 23:42:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:40,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:40,316 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 23:42:40,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:42:40,316 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1201199661, now seen corresponding path program 1 times [2020-10-27 23:42:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:40,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342711737] [2020-10-27 23:42:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:40,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:45,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:42:45,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:45,642 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:45,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:45,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:45,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:45,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:42:45,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:45,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:45,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:45,710 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 23:42:45,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342711737] [2020-10-27 23:42:45,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:45,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:45,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392065365] [2020-10-27 23:42:45,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:45,714 INFO L87 Difference]: Start difference. First operand 466 states and 681 transitions. Second operand 10 states. [2020-10-27 23:42:45,920 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:42:46,692 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:47,685 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:48,118 INFO L93 Difference]: Finished difference Result 4378 states and 6595 transitions. [2020-10-27 23:42:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:42:48,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:42:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:48,143 INFO L225 Difference]: With dead ends: 4378 [2020-10-27 23:42:48,144 INFO L226 Difference]: Without dead ends: 3987 [2020-10-27 23:42:48,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:42:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2020-10-27 23:42:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 498. [2020-10-27 23:42:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 23:42:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 709 transitions. [2020-10-27 23:42:48,289 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 709 transitions. Word has length 54 [2020-10-27 23:42:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:48,289 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 709 transitions. [2020-10-27 23:42:48,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 709 transitions. [2020-10-27 23:42:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:48,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:48,292 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 23:42:48,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:42:48,292 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -552316116, now seen corresponding path program 1 times [2020-10-27 23:42:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:48,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971056511] [2020-10-27 23:42:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:50,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:53,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:53,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:53,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:53,557 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:53,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:53,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:53,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:53,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:53,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:53,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:53,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:53,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:53,600 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 23:42:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971056511] [2020-10-27 23:42:53,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:53,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:53,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763030544] [2020-10-27 23:42:53,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:53,604 INFO L87 Difference]: Start difference. First operand 498 states and 709 transitions. Second operand 6 states. [2020-10-27 23:42:53,859 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:54,466 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:54,645 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:55,658 INFO L93 Difference]: Finished difference Result 3484 states and 5153 transitions. [2020-10-27 23:42:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:55,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:42:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:55,678 INFO L225 Difference]: With dead ends: 3484 [2020-10-27 23:42:55,678 INFO L226 Difference]: Without dead ends: 3123 [2020-10-27 23:42:55,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2020-10-27 23:42:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1713. [2020-10-27 23:42:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1713 states. [2020-10-27 23:42:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2489 transitions. [2020-10-27 23:42:55,912 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2489 transitions. Word has length 55 [2020-10-27 23:42:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:55,913 INFO L481 AbstractCegarLoop]: Abstraction has 1713 states and 2489 transitions. [2020-10-27 23:42:55,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2489 transitions. [2020-10-27 23:42:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:42:55,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:55,916 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 23:42:55,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:42:55,916 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash -729303276, now seen corresponding path program 1 times [2020-10-27 23:42:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:55,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705585875] [2020-10-27 23:42:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:55,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:55,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 23:43:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:00,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,312 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:01,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,341 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 23:43:01,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705585875] [2020-10-27 23:43:01,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:01,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 23:43:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542903902] [2020-10-27 23:43:01,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 23:43:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 23:43:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:01,344 INFO L87 Difference]: Start difference. First operand 1713 states and 2489 transitions. Second operand 13 states. [2020-10-27 23:43:01,636 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:43:03,070 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:43:06,329 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:43:06,572 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:43:06,810 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:09,018 INFO L93 Difference]: Finished difference Result 15851 states and 23536 transitions. [2020-10-27 23:43:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-27 23:43:09,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-27 23:43:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:09,096 INFO L225 Difference]: With dead ends: 15851 [2020-10-27 23:43:09,097 INFO L226 Difference]: Without dead ends: 15500 [2020-10-27 23:43:09,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1071, Invalid=4781, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 23:43:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15500 states. [2020-10-27 23:43:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15500 to 1723. [2020-10-27 23:43:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1723 states. [2020-10-27 23:43:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2501 transitions. [2020-10-27 23:43:09,573 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2501 transitions. Word has length 55 [2020-10-27 23:43:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:09,574 INFO L481 AbstractCegarLoop]: Abstraction has 1723 states and 2501 transitions. [2020-10-27 23:43:09,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 23:43:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2501 transitions. [2020-10-27 23:43:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:09,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:09,578 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 23:43:09,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:43:09,578 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1502868669, now seen corresponding path program 1 times [2020-10-27 23:43:09,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:09,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80861455] [2020-10-27 23:43:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:43:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:14,819 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:14,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:14,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:14,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:14,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:14,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:14,849 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 23:43:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80861455] [2020-10-27 23:43:14,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:14,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:14,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376775660] [2020-10-27 23:43:14,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:14,852 INFO L87 Difference]: Start difference. First operand 1723 states and 2501 transitions. Second operand 6 states. [2020-10-27 23:43:15,077 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:43:15,524 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:43:15,733 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:43:15,911 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:43:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:16,640 INFO L93 Difference]: Finished difference Result 6792 states and 10162 transitions. [2020-10-27 23:43:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:43:16,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:43:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:16,665 INFO L225 Difference]: With dead ends: 6792 [2020-10-27 23:43:16,665 INFO L226 Difference]: Without dead ends: 5509 [2020-10-27 23:43:16,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2020-10-27 23:43:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 3631. [2020-10-27 23:43:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3631 states. [2020-10-27 23:43:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 5336 transitions. [2020-10-27 23:43:17,239 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 5336 transitions. Word has length 55 [2020-10-27 23:43:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:17,239 INFO L481 AbstractCegarLoop]: Abstraction has 3631 states and 5336 transitions. [2020-10-27 23:43:17,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 5336 transitions. [2020-10-27 23:43:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:17,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:17,241 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 23:43:17,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:43:17,242 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash -942431699, now seen corresponding path program 1 times [2020-10-27 23:43:17,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:17,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62007285] [2020-10-27 23:43:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:22,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:22,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 23:43:22,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:43:22,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:43:22,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:43:22,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:22,575 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:22,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:22,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:22,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:22,600 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 23:43:22,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62007285] [2020-10-27 23:43:22,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:22,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199567197] [2020-10-27 23:43:22,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:22,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:22,603 INFO L87 Difference]: Start difference. First operand 3631 states and 5336 transitions. Second operand 10 states. [2020-10-27 23:43:22,844 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:43:23,662 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:43:24,921 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:27,572 INFO L93 Difference]: Finished difference Result 25385 states and 37410 transitions. [2020-10-27 23:43:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:43:27,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:43:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:27,627 INFO L225 Difference]: With dead ends: 25385 [2020-10-27 23:43:27,627 INFO L226 Difference]: Without dead ends: 22176 [2020-10-27 23:43:27,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:43:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22176 states. [2020-10-27 23:43:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22176 to 3610. [2020-10-27 23:43:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2020-10-27 23:43:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5258 transitions. [2020-10-27 23:43:28,420 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5258 transitions. Word has length 55 [2020-10-27 23:43:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:28,421 INFO L481 AbstractCegarLoop]: Abstraction has 3610 states and 5258 transitions. [2020-10-27 23:43:28,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5258 transitions. [2020-10-27 23:43:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:43:28,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:28,423 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 23:43:28,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:43:28,424 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2098664318, now seen corresponding path program 1 times [2020-10-27 23:43:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:28,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862060371] [2020-10-27 23:43:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:33,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:33,963 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:33,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:33,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:33,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:33,993 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 23:43:33,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862060371] [2020-10-27 23:43:33,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:33,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 23:43:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946479273] [2020-10-27 23:43:33,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:43:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:43:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:43:33,996 INFO L87 Difference]: Start difference. First operand 3610 states and 5258 transitions. Second operand 14 states. [2020-10-27 23:43:34,619 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 142 [2020-10-27 23:43:35,043 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-27 23:43:35,185 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-27 23:43:35,354 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 23:43:36,971 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2020-10-27 23:43:37,226 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 23:43:37,513 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:37,940 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 142 [2020-10-27 23:43:39,285 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 23:43:40,271 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-27 23:43:42,658 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:43:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:43,590 INFO L93 Difference]: Finished difference Result 13379 states and 19422 transitions. [2020-10-27 23:43:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 23:43:43,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 23:43:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:43,619 INFO L225 Difference]: With dead ends: 13379 [2020-10-27 23:43:43,619 INFO L226 Difference]: Without dead ends: 12458 [2020-10-27 23:43:43,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=586, Invalid=3320, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 23:43:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2020-10-27 23:43:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 3610. [2020-10-27 23:43:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2020-10-27 23:43:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5257 transitions. [2020-10-27 23:43:44,321 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5257 transitions. Word has length 56 [2020-10-27 23:43:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:44,321 INFO L481 AbstractCegarLoop]: Abstraction has 3610 states and 5257 transitions. [2020-10-27 23:43:44,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 23:43:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5257 transitions. [2020-10-27 23:43:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:43:44,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:44,324 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 23:43:44,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:43:44,324 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1684316739, now seen corresponding path program 1 times [2020-10-27 23:43:44,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:44,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314342494] [2020-10-27 23:43:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:49,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:43:49,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:49,666 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-27 23:43:49,921 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:49,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:49,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:49,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:49,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:49,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:49,950 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 23:43:49,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314342494] [2020-10-27 23:43:49,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:49,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:49,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427358018] [2020-10-27 23:43:49,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:49,953 INFO L87 Difference]: Start difference. First operand 3610 states and 5257 transitions. Second operand 11 states. [2020-10-27 23:43:50,517 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 147 [2020-10-27 23:43:50,832 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 23:43:51,999 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:55,104 INFO L93 Difference]: Finished difference Result 12788 states and 18759 transitions. [2020-10-27 23:43:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:43:55,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 23:43:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:55,127 INFO L225 Difference]: With dead ends: 12788 [2020-10-27 23:43:55,127 INFO L226 Difference]: Without dead ends: 10939 [2020-10-27 23:43:55,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:43:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10939 states. [2020-10-27 23:43:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 3630. [2020-10-27 23:43:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3630 states. [2020-10-27 23:43:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 5286 transitions. [2020-10-27 23:43:55,832 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 5286 transitions. Word has length 56 [2020-10-27 23:43:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:55,833 INFO L481 AbstractCegarLoop]: Abstraction has 3630 states and 5286 transitions. [2020-10-27 23:43:55,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 5286 transitions. [2020-10-27 23:43:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:43:55,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:55,835 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 23:43:55,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:43:55,835 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash 239208695, now seen corresponding path program 1 times [2020-10-27 23:43:55,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:55,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854916580] [2020-10-27 23:43:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:44:00,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:01,145 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-10-27 23:44:01,402 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:44:01,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:01,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:01,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:01,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:01,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:01,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:01,421 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 23:44:01,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854916580] [2020-10-27 23:44:01,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:01,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:01,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908725804] [2020-10-27 23:44:01,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:01,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:01,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:01,424 INFO L87 Difference]: Start difference. First operand 3630 states and 5286 transitions. Second operand 11 states. [2020-10-27 23:44:01,742 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 23:44:02,005 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 23:44:02,689 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:44:04,361 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:44:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:06,995 INFO L93 Difference]: Finished difference Result 22204 states and 32336 transitions. [2020-10-27 23:44:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 23:44:06,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 23:44:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:07,027 INFO L225 Difference]: With dead ends: 22204 [2020-10-27 23:44:07,027 INFO L226 Difference]: Without dead ends: 20631 [2020-10-27 23:44:07,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:44:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20631 states. [2020-10-27 23:44:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20631 to 3633. [2020-10-27 23:44:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2020-10-27 23:44:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 5289 transitions. [2020-10-27 23:44:07,854 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 5289 transitions. Word has length 56 [2020-10-27 23:44:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:07,855 INFO L481 AbstractCegarLoop]: Abstraction has 3633 states and 5289 transitions. [2020-10-27 23:44:07,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 5289 transitions. [2020-10-27 23:44:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:07,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:07,856 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 23:44:07,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:44:07,857 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash -350208595, now seen corresponding path program 1 times [2020-10-27 23:44:07,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:07,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852645751] [2020-10-27 23:44:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:07,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:44:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:13,129 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:44:13,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:13,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:13,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:13,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:13,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:13,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:13,151 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 23:44:13,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852645751] [2020-10-27 23:44:13,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:13,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:44:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039055825] [2020-10-27 23:44:13,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:13,153 INFO L87 Difference]: Start difference. First operand 3633 states and 5289 transitions. Second operand 6 states. [2020-10-27 23:44:13,359 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:44:14,155 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:44:14,412 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:44:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:19,052 INFO L93 Difference]: Finished difference Result 28937 states and 43036 transitions. [2020-10-27 23:44:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:19,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 23:44:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:19,087 INFO L225 Difference]: With dead ends: 28937 [2020-10-27 23:44:19,087 INFO L226 Difference]: Without dead ends: 25642 [2020-10-27 23:44:19,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25642 states. [2020-10-27 23:44:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25642 to 13286. [2020-10-27 23:44:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13286 states. [2020-10-27 23:44:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13286 states to 13286 states and 19582 transitions. [2020-10-27 23:44:21,653 INFO L78 Accepts]: Start accepts. Automaton has 13286 states and 19582 transitions. Word has length 56 [2020-10-27 23:44:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:21,654 INFO L481 AbstractCegarLoop]: Abstraction has 13286 states and 19582 transitions. [2020-10-27 23:44:21,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 13286 states and 19582 transitions. [2020-10-27 23:44:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:44:21,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:21,657 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 23:44:21,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:44:21,657 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1554694256, now seen corresponding path program 1 times [2020-10-27 23:44:21,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:21,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207731664] [2020-10-27 23:44:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:22,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:25,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:25,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:44:25,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:44:25,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3719 [2020-10-27 23:44:25,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:44:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:44:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:25,623 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:44:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:25,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:25,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:25,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:25,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:44:25,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:25,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:25,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:25,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:25,651 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 23:44:25,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207731664] [2020-10-27 23:44:25,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:25,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:44:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490339531] [2020-10-27 23:44:25,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:25,654 INFO L87 Difference]: Start difference. First operand 13286 states and 19582 transitions. Second operand 6 states. [2020-10-27 23:44:25,911 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:44:26,446 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:44:26,643 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:44:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:30,344 INFO L93 Difference]: Finished difference Result 27639 states and 41086 transitions. [2020-10-27 23:44:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:44:30,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 23:44:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:30,369 INFO L225 Difference]: With dead ends: 27639 [2020-10-27 23:44:30,369 INFO L226 Difference]: Without dead ends: 20452 [2020-10-27 23:44:30,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20452 states. [2020-10-27 23:44:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20452 to 18270. [2020-10-27 23:44:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18270 states. [2020-10-27 23:44:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18270 states to 18270 states and 27153 transitions. [2020-10-27 23:44:33,980 INFO L78 Accepts]: Start accepts. Automaton has 18270 states and 27153 transitions. Word has length 57 [2020-10-27 23:44:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:33,980 INFO L481 AbstractCegarLoop]: Abstraction has 18270 states and 27153 transitions. [2020-10-27 23:44:33,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 18270 states and 27153 transitions. [2020-10-27 23:44:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:44:33,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:33,984 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 23:44:33,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:44:33,984 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:33,984 INFO L82 PathProgramCache]: Analyzing trace with hash 654000443, now seen corresponding path program 1 times [2020-10-27 23:44:33,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:33,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485782937] [2020-10-27 23:44:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:34,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:37,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:39,277 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 24 [2020-10-27 23:44:39,499 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:44:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:39,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:39,520 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 23:44:39,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485782937] [2020-10-27 23:44:39,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:39,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879802152] [2020-10-27 23:44:39,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:39,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:39,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:39,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:39,521 INFO L87 Difference]: Start difference. First operand 18270 states and 27153 transitions. Second operand 10 states. [2020-10-27 23:44:39,759 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:44:40,700 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:44:45,545 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:44:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:58,583 INFO L93 Difference]: Finished difference Result 85998 states and 125473 transitions. [2020-10-27 23:44:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 23:44:58,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 23:44:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:58,703 INFO L225 Difference]: With dead ends: 85998 [2020-10-27 23:44:58,703 INFO L226 Difference]: Without dead ends: 77397 [2020-10-27 23:44:58,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:44:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77397 states. [2020-10-27 23:45:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77397 to 18281. [2020-10-27 23:45:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18281 states. [2020-10-27 23:45:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18281 states to 18281 states and 27151 transitions. [2020-10-27 23:45:03,254 INFO L78 Accepts]: Start accepts. Automaton has 18281 states and 27151 transitions. Word has length 57 [2020-10-27 23:45:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:03,255 INFO L481 AbstractCegarLoop]: Abstraction has 18281 states and 27151 transitions. [2020-10-27 23:45:03,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:45:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 18281 states and 27151 transitions. [2020-10-27 23:45:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:45:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:03,258 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 23:45:03,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:45:03,259 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1851690260, now seen corresponding path program 1 times [2020-10-27 23:45:03,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:03,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505210667] [2020-10-27 23:45:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:03,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:06,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:45:08,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:08,458 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2020-10-27 23:45:08,760 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:45:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:08,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:08,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:08,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:08,783 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 23:45:08,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505210667] [2020-10-27 23:45:08,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:08,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:45:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30382202] [2020-10-27 23:45:08,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:45:08,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:45:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:45:08,785 INFO L87 Difference]: Start difference. First operand 18281 states and 27151 transitions. Second operand 11 states. [2020-10-27 23:45:09,520 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 150 [2020-10-27 23:45:11,684 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:45:12,003 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:45:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:24,713 INFO L93 Difference]: Finished difference Result 68158 states and 101362 transitions. [2020-10-27 23:45:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:45:24,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 23:45:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:24,788 INFO L225 Difference]: With dead ends: 68158 [2020-10-27 23:45:24,788 INFO L226 Difference]: Without dead ends: 51017 [2020-10-27 23:45:24,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:45:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51017 states. [2020-10-27 23:45:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51017 to 18278. [2020-10-27 23:45:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18278 states. [2020-10-27 23:45:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18278 states to 18278 states and 27034 transitions. [2020-10-27 23:45:29,079 INFO L78 Accepts]: Start accepts. Automaton has 18278 states and 27034 transitions. Word has length 57 [2020-10-27 23:45:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:29,079 INFO L481 AbstractCegarLoop]: Abstraction has 18278 states and 27034 transitions. [2020-10-27 23:45:29,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:45:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 18278 states and 27034 transitions. [2020-10-27 23:45:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:45:29,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:29,083 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 23:45:29,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:45:29,083 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1284391065, now seen corresponding path program 1 times [2020-10-27 23:45:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:29,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931173002] [2020-10-27 23:45:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:29,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4295 [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:45:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:45:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:45:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:33,603 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:45:33,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:33,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:33,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:45:33,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:33,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:33,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:33,626 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 23:45:33,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931173002] [2020-10-27 23:45:33,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:33,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:45:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854874105] [2020-10-27 23:45:33,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:45:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:45:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:33,629 INFO L87 Difference]: Start difference. First operand 18278 states and 27034 transitions. Second operand 6 states. [2020-10-27 23:45:33,865 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:45:34,579 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:45:34,809 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:45:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:40,342 INFO L93 Difference]: Finished difference Result 35293 states and 52396 transitions. [2020-10-27 23:45:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:45:40,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 23:45:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:40,378 INFO L225 Difference]: With dead ends: 35293 [2020-10-27 23:45:40,378 INFO L226 Difference]: Without dead ends: 25626 [2020-10-27 23:45:40,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:45:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25626 states. [2020-10-27 23:45:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25626 to 23244. [2020-10-27 23:45:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23244 states. [2020-10-27 23:45:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23244 states to 23244 states and 34551 transitions. [2020-10-27 23:45:45,509 INFO L78 Accepts]: Start accepts. Automaton has 23244 states and 34551 transitions. Word has length 57 [2020-10-27 23:45:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:45,510 INFO L481 AbstractCegarLoop]: Abstraction has 23244 states and 34551 transitions. [2020-10-27 23:45:45,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23244 states and 34551 transitions. [2020-10-27 23:45:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:45:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:45,513 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 23:45:45,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:45:45,513 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -55038432, now seen corresponding path program 1 times [2020-10-27 23:45:45,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:45,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063278106] [2020-10-27 23:45:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:45,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:46,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:46,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:45:46,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:45:46,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:46,549 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 28 [2020-10-27 23:45:46,780 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:45:46,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:46,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:46,808 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 23:45:46,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063278106] [2020-10-27 23:45:46,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:46,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:45:46,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494345015] [2020-10-27 23:45:46,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:45:46,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:46,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:45:46,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:45:46,810 INFO L87 Difference]: Start difference. First operand 23244 states and 34551 transitions. Second operand 10 states. [2020-10-27 23:45:47,038 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:45:48,299 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 136