/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:38:17,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:38:17,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:38:17,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:38:17,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:38:17,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:38:17,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:38:17,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:38:17,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:38:17,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:38:17,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:38:17,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:38:17,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:38:17,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:38:17,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:38:17,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:38:17,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:38:17,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:38:17,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:38:17,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:38:17,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:38:17,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:38:17,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:38:17,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:38:17,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:38:17,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:38:17,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:38:17,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:38:17,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:38:17,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:38:17,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:38:17,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:38:17,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:38:17,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:38:17,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:38:17,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:38:17,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:38:17,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:38:17,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:38:17,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:38:17,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:38:17,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:38:17,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:38:17,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:38:17,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:38:17,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:38:17,311 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:38:17,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:38:17,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:38:17,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:38:17,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:38:17,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:38:17,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:38:17,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:38:17,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:38:17,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:38:17,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:38:17,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:38:17,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:38:17,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:38:17,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:38:17,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:38:17,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:38:17,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:38:17,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:38:17,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:38:17,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:38:17,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:38:17,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:38:17,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:38:17,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:38:17,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:38:17,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:38:17,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:38:17,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:38:17,772 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:38:17,773 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:38:17,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:38:17,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61df0cd3/87f2017caeea45d89b8cc7d06ae5ef9d/FLAG7753fc49d [2020-10-27 05:38:18,610 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:38:18,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:38:18,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61df0cd3/87f2017caeea45d89b8cc7d06ae5ef9d/FLAG7753fc49d [2020-10-27 05:38:18,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61df0cd3/87f2017caeea45d89b8cc7d06ae5ef9d [2020-10-27 05:38:18,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:38:18,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:38:18,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:38:18,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:38:18,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:38:18,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:18" (1/1) ... [2020-10-27 05:38:18,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f1e49f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:18, skipping insertion in model container [2020-10-27 05:38:18,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:18" (1/1) ... [2020-10-27 05:38:18,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:38:18,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:38:19,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:38:19,629 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:38:19,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:38:19,951 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:38:19,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19 WrapperNode [2020-10-27 05:38:19,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:38:19,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:38:19,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:38:19,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:38:19,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:19,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... [2020-10-27 05:38:20,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:38:20,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:38:20,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:38:20,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:38:20,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:38:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:38:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:38:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:38:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:38:20,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:38:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:38:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:38:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:38:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:38:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:38:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:38:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:38:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:38:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:38:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:38:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:38:22,068 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:38:22,069 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:38:22,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:22 BoogieIcfgContainer [2020-10-27 05:38:22,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:38:22,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:38:22,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:38:22,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:38:22,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:38:18" (1/3) ... [2020-10-27 05:38:22,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444b2ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:22, skipping insertion in model container [2020-10-27 05:38:22,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:19" (2/3) ... [2020-10-27 05:38:22,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444b2ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:22, skipping insertion in model container [2020-10-27 05:38:22,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:22" (3/3) ... [2020-10-27 05:38:22,081 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:38:22,095 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:38:22,102 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:38:22,117 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:38:22,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:38:22,151 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:38:22,151 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:38:22,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:38:22,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:38:22,151 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:38:22,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:38:22,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:38:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2020-10-27 05:38:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:22,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:22,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:22,200 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:22,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1101731786, now seen corresponding path program 1 times [2020-10-27 05:38:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:22,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28502529] [2020-10-27 05:38:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:22,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:23,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:23,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:25,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:26,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:27,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:27,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:38:27,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:38:27,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:27,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:38:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:27,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:38:27,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:38:28,413 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:28,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:28,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:28,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:28,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:38:28,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:28,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:28,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28502529] [2020-10-27 05:38:28,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:28,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:38:28,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21248175] [2020-10-27 05:38:28,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:38:28,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:38:28,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:38:28,548 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 8 states. [2020-10-27 05:38:29,219 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:38:33,624 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:38:35,237 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:38:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:35,484 INFO L93 Difference]: Finished difference Result 851 states and 1458 transitions. [2020-10-27 05:38:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:38:35,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:38:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:35,535 INFO L225 Difference]: With dead ends: 851 [2020-10-27 05:38:35,535 INFO L226 Difference]: Without dead ends: 705 [2020-10-27 05:38:35,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:38:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-27 05:38:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-10-27 05:38:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-27 05:38:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 604 transitions. [2020-10-27 05:38:35,699 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 604 transitions. Word has length 55 [2020-10-27 05:38:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:35,700 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 604 transitions. [2020-10-27 05:38:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:38:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 604 transitions. [2020-10-27 05:38:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:35,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:35,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:35,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:38:35,717 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2092309806, now seen corresponding path program 1 times [2020-10-27 05:38:35,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:35,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077003835] [2020-10-27 05:38:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:35,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:35,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:37,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:39,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:40,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:40,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:40,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:38:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:38:40,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:40,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:38:40,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:40,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:38:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:38:41,514 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:41,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:41,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:41,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:41,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077003835] [2020-10-27 05:38:41,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:41,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:38:41,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61008993] [2020-10-27 05:38:41,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:38:41,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:38:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:41,618 INFO L87 Difference]: Start difference. First operand 462 states and 604 transitions. Second operand 9 states. [2020-10-27 05:38:42,409 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:38:46,123 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 304 DAG size of output: 303 [2020-10-27 05:38:46,874 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:38:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:48,007 INFO L93 Difference]: Finished difference Result 1106 states and 1582 transitions. [2020-10-27 05:38:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:38:48,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 05:38:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:48,018 INFO L225 Difference]: With dead ends: 1106 [2020-10-27 05:38:48,018 INFO L226 Difference]: Without dead ends: 876 [2020-10-27 05:38:48,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:38:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-27 05:38:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 555. [2020-10-27 05:38:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-27 05:38:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 755 transitions. [2020-10-27 05:38:48,092 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 755 transitions. Word has length 55 [2020-10-27 05:38:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:48,093 INFO L481 AbstractCegarLoop]: Abstraction has 555 states and 755 transitions. [2020-10-27 05:38:48,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:38:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 755 transitions. [2020-10-27 05:38:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:48,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:48,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:38:48,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1194959055, now seen corresponding path program 1 times [2020-10-27 05:38:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:48,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522032095] [2020-10-27 05:38:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:49,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:49,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:50,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:53,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:38:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:54,001 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:54,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:54,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:54,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:54,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:54,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 05:38:54,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:54,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:54,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:38:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522032095] [2020-10-27 05:38:54,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:54,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:54,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27319844] [2020-10-27 05:38:54,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:54,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:54,097 INFO L87 Difference]: Start difference. First operand 555 states and 755 transitions. Second operand 11 states. [2020-10-27 05:38:54,791 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:38:57,700 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:38:59,995 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:39:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:00,316 INFO L93 Difference]: Finished difference Result 1683 states and 2460 transitions. [2020-10-27 05:39:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:39:00,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 05:39:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:00,326 INFO L225 Difference]: With dead ends: 1683 [2020-10-27 05:39:00,326 INFO L226 Difference]: Without dead ends: 1494 [2020-10-27 05:39:00,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:39:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-10-27 05:39:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 543. [2020-10-27 05:39:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-10-27 05:39:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 729 transitions. [2020-10-27 05:39:00,391 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 729 transitions. Word has length 55 [2020-10-27 05:39:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:00,394 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 729 transitions. [2020-10-27 05:39:00,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:39:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 729 transitions. [2020-10-27 05:39:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:39:00,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:00,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:00,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:39:00,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash 425180388, now seen corresponding path program 1 times [2020-10-27 05:39:00,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:00,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289574307] [2020-10-27 05:39:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:00,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:01,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:02,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:02,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:03,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:03,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:05,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:05,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:39:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:06,250 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:06,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:06,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:06,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:06,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 05:39:06,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289574307] [2020-10-27 05:39:06,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:06,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:39:06,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118815201] [2020-10-27 05:39:06,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:06,335 INFO L87 Difference]: Start difference. First operand 543 states and 729 transitions. Second operand 6 states. [2020-10-27 05:39:07,032 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:09,017 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:39:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:09,590 INFO L93 Difference]: Finished difference Result 1158 states and 1619 transitions. [2020-10-27 05:39:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:39:09,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:39:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:09,596 INFO L225 Difference]: With dead ends: 1158 [2020-10-27 05:39:09,596 INFO L226 Difference]: Without dead ends: 711 [2020-10-27 05:39:09,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-10-27 05:39:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 705. [2020-10-27 05:39:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2020-10-27 05:39:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 987 transitions. [2020-10-27 05:39:09,653 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 987 transitions. Word has length 56 [2020-10-27 05:39:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:09,654 INFO L481 AbstractCegarLoop]: Abstraction has 705 states and 987 transitions. [2020-10-27 05:39:09,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:39:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 987 transitions. [2020-10-27 05:39:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:09,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:09,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:09,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:39:09,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1710846274, now seen corresponding path program 1 times [2020-10-27 05:39:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:09,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462057556] [2020-10-27 05:39:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:11,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:12,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:14,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:39:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:39:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:15,619 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:15,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:15,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:15,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:15,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:15,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462057556] [2020-10-27 05:39:15,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:15,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:39:15,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880224436] [2020-10-27 05:39:15,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:39:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:15,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:39:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:39:15,729 INFO L87 Difference]: Start difference. First operand 705 states and 987 transitions. Second operand 8 states. [2020-10-27 05:39:16,384 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:39:18,473 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:39:20,073 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:20,458 INFO L93 Difference]: Finished difference Result 2221 states and 3247 transitions. [2020-10-27 05:39:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:39:20,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 05:39:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:20,477 INFO L225 Difference]: With dead ends: 2221 [2020-10-27 05:39:20,478 INFO L226 Difference]: Without dead ends: 1835 [2020-10-27 05:39:20,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:39:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2020-10-27 05:39:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 663. [2020-10-27 05:39:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-10-27 05:39:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 911 transitions. [2020-10-27 05:39:20,556 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 911 transitions. Word has length 57 [2020-10-27 05:39:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:20,556 INFO L481 AbstractCegarLoop]: Abstraction has 663 states and 911 transitions. [2020-10-27 05:39:20,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 911 transitions. [2020-10-27 05:39:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:20,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:20,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:39:20,558 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -590228016, now seen corresponding path program 1 times [2020-10-27 05:39:20,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:20,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194731655] [2020-10-27 05:39:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:20,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:20,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:20,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:21,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:21,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:21,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:25,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:39:25,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:26,422 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:26,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:26,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:26,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:26,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:26,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:39:26,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:26,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:26,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194731655] [2020-10-27 05:39:26,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:26,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:26,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662779249] [2020-10-27 05:39:26,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:39:26,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:39:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:26,516 INFO L87 Difference]: Start difference. First operand 663 states and 911 transitions. Second operand 11 states. [2020-10-27 05:39:27,976 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 304 DAG size of output: 302 [2020-10-27 05:39:31,515 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 307 DAG size of output: 305 [2020-10-27 05:39:32,284 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:39:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:34,691 INFO L93 Difference]: Finished difference Result 1810 states and 2588 transitions. [2020-10-27 05:39:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:39:34,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:39:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:34,701 INFO L225 Difference]: With dead ends: 1810 [2020-10-27 05:39:34,701 INFO L226 Difference]: Without dead ends: 1805 [2020-10-27 05:39:34,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:39:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2020-10-27 05:39:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 682. [2020-10-27 05:39:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-10-27 05:39:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 941 transitions. [2020-10-27 05:39:34,783 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 941 transitions. Word has length 57 [2020-10-27 05:39:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:34,784 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 941 transitions. [2020-10-27 05:39:34,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:39:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 941 transitions. [2020-10-27 05:39:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:34,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:34,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:39:34,786 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1093631163, now seen corresponding path program 1 times [2020-10-27 05:39:34,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:34,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249487894] [2020-10-27 05:39:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:34,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:34,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:35,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:39,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:39:39,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:39,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:39:39,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:40,633 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:40,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:40,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:40,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:39:40,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:40,710 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 05:39:40,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249487894] [2020-10-27 05:39:40,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:40,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:39:40,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693298977] [2020-10-27 05:39:40,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:39:40,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:40,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:39:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:39:40,712 INFO L87 Difference]: Start difference. First operand 682 states and 941 transitions. Second operand 8 states. [2020-10-27 05:39:41,438 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:39:43,688 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:39:45,474 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:39:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:45,892 INFO L93 Difference]: Finished difference Result 2320 states and 3341 transitions. [2020-10-27 05:39:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:39:45,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 05:39:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:45,902 INFO L225 Difference]: With dead ends: 2320 [2020-10-27 05:39:45,903 INFO L226 Difference]: Without dead ends: 1999 [2020-10-27 05:39:45,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2020-10-27 05:39:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 707. [2020-10-27 05:39:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-27 05:39:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 978 transitions. [2020-10-27 05:39:45,991 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 978 transitions. Word has length 57 [2020-10-27 05:39:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:45,991 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 978 transitions. [2020-10-27 05:39:45,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 978 transitions. [2020-10-27 05:39:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:45,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:45,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:45,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:39:45,993 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -939490235, now seen corresponding path program 1 times [2020-10-27 05:39:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:45,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969990038] [2020-10-27 05:39:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:47,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:51,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:39:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:51,930 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:51,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:51,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:51,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:52,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969990038] [2020-10-27 05:39:52,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307176966] [2020-10-27 05:39:52,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:39:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:39:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:52,015 INFO L87 Difference]: Start difference. First operand 707 states and 978 transitions. Second operand 11 states. [2020-10-27 05:39:52,786 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:39:55,828 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:39:56,740 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:39:59,935 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:40:00,718 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-27 05:40:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:01,882 INFO L93 Difference]: Finished difference Result 4242 states and 6070 transitions. [2020-10-27 05:40:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 05:40:01,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:40:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:01,899 INFO L225 Difference]: With dead ends: 4242 [2020-10-27 05:40:01,899 INFO L226 Difference]: Without dead ends: 3728 [2020-10-27 05:40:01,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:40:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2020-10-27 05:40:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 1026. [2020-10-27 05:40:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2020-10-27 05:40:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1448 transitions. [2020-10-27 05:40:02,091 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1448 transitions. Word has length 57 [2020-10-27 05:40:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:02,092 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 1448 transitions. [2020-10-27 05:40:02,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:40:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1448 transitions. [2020-10-27 05:40:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:40:02,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:02,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:02,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:40:02,094 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash 104195807, now seen corresponding path program 1 times [2020-10-27 05:40:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:02,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658414146] [2020-10-27 05:40:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:02,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:02,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:02,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:03,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:03,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:04,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:04,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:04,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:05,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:07,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:40:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:07,913 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:07,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:07,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:07,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:07,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658414146] [2020-10-27 05:40:07,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:07,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:40:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079810238] [2020-10-27 05:40:07,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:40:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:40:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:40:07,966 INFO L87 Difference]: Start difference. First operand 1026 states and 1448 transitions. Second operand 10 states. [2020-10-27 05:40:08,696 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:40:11,332 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:40:12,038 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:40:12,847 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:40:13,730 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:40:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:16,284 INFO L93 Difference]: Finished difference Result 3563 states and 5137 transitions. [2020-10-27 05:40:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:40:16,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 05:40:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:16,300 INFO L225 Difference]: With dead ends: 3563 [2020-10-27 05:40:16,300 INFO L226 Difference]: Without dead ends: 3101 [2020-10-27 05:40:16,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:40:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2020-10-27 05:40:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 1404. [2020-10-27 05:40:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-27 05:40:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2000 transitions. [2020-10-27 05:40:16,581 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2000 transitions. Word has length 57 [2020-10-27 05:40:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:16,581 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 2000 transitions. [2020-10-27 05:40:16,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:40:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2000 transitions. [2020-10-27 05:40:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:40:16,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:16,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:16,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:40:16,584 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1783028029, now seen corresponding path program 1 times [2020-10-27 05:40:16,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:16,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237127723] [2020-10-27 05:40:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:16,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:16,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:20,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:21,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:40:21,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:22,381 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:22,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:22,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:22,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:22,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237127723] [2020-10-27 05:40:22,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:22,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:22,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972206373] [2020-10-27 05:40:22,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:22,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:22,441 INFO L87 Difference]: Start difference. First operand 1404 states and 2000 transitions. Second operand 6 states. [2020-10-27 05:40:23,204 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:40:25,095 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:40:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:25,766 INFO L93 Difference]: Finished difference Result 2906 states and 4214 transitions. [2020-10-27 05:40:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:25,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-27 05:40:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:25,773 INFO L225 Difference]: With dead ends: 2906 [2020-10-27 05:40:25,773 INFO L226 Difference]: Without dead ends: 1700 [2020-10-27 05:40:25,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:40:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2020-10-27 05:40:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1694. [2020-10-27 05:40:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2020-10-27 05:40:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2450 transitions. [2020-10-27 05:40:26,055 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2450 transitions. Word has length 58 [2020-10-27 05:40:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:26,056 INFO L481 AbstractCegarLoop]: Abstraction has 1694 states and 2450 transitions. [2020-10-27 05:40:26,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2450 transitions. [2020-10-27 05:40:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:40:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:26,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:26,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:40:26,058 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1091941505, now seen corresponding path program 1 times [2020-10-27 05:40:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:26,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408305731] [2020-10-27 05:40:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:27,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:27,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:28,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:28,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:31,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:31,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:40:31,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 05:40:31,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:40:31,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:31,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:40:31,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:31,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:40:31,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:32,001 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:32,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:32,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:32,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408305731] [2020-10-27 05:40:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:40:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028282857] [2020-10-27 05:40:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:40:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:40:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:40:32,064 INFO L87 Difference]: Start difference. First operand 1694 states and 2450 transitions. Second operand 11 states. [2020-10-27 05:40:33,661 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 311 DAG size of output: 309 [2020-10-27 05:40:36,828 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 309 DAG size of output: 306 [2020-10-27 05:40:37,690 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:40:38,446 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:40:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:40,282 INFO L93 Difference]: Finished difference Result 4148 states and 6153 transitions. [2020-10-27 05:40:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:40:40,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-27 05:40:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:40,296 INFO L225 Difference]: With dead ends: 4148 [2020-10-27 05:40:40,296 INFO L226 Difference]: Without dead ends: 3110 [2020-10-27 05:40:40,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:40:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-10-27 05:40:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1722. [2020-10-27 05:40:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1722 states. [2020-10-27 05:40:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2491 transitions. [2020-10-27 05:40:40,579 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2491 transitions. Word has length 58 [2020-10-27 05:40:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:40,579 INFO L481 AbstractCegarLoop]: Abstraction has 1722 states and 2491 transitions. [2020-10-27 05:40:40,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:40:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2491 transitions. [2020-10-27 05:40:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:40:40,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:40,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:40,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:40:40,582 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1264082807, now seen corresponding path program 1 times [2020-10-27 05:40:40,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:40,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040976726] [2020-10-27 05:40:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:40,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:40,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:44,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:44,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:40:44,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:40:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3958 [2020-10-27 05:40:44,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:40:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:40:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:40:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:45,356 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:45,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:45,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:45,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040976726] [2020-10-27 05:40:45,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:45,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:40:45,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17315944] [2020-10-27 05:40:45,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:40:45,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:40:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:40:45,397 INFO L87 Difference]: Start difference. First operand 1722 states and 2491 transitions. Second operand 9 states. [2020-10-27 05:40:46,150 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:40:48,310 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:40:50,455 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:40:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:50,951 INFO L93 Difference]: Finished difference Result 6901 states and 10217 transitions. [2020-10-27 05:40:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:40:50,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:40:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:50,973 INFO L225 Difference]: With dead ends: 6901 [2020-10-27 05:40:50,973 INFO L226 Difference]: Without dead ends: 5280 [2020-10-27 05:40:50,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:40:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2020-10-27 05:40:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 2315. [2020-10-27 05:40:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2315 states. [2020-10-27 05:40:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3367 transitions. [2020-10-27 05:40:51,372 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3367 transitions. Word has length 58 [2020-10-27 05:40:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:51,372 INFO L481 AbstractCegarLoop]: Abstraction has 2315 states and 3367 transitions. [2020-10-27 05:40:51,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:40:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3367 transitions. [2020-10-27 05:40:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:40:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:51,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:51,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:40:51,375 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 63653439, now seen corresponding path program 1 times [2020-10-27 05:40:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147437305] [2020-10-27 05:40:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:51,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:55,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4258 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:40:55,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:56,503 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:56,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:56,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:56,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147437305] [2020-10-27 05:40:56,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:56,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:40:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774196999] [2020-10-27 05:40:56,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:40:56,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:40:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:40:56,543 INFO L87 Difference]: Start difference. First operand 2315 states and 3367 transitions. Second operand 8 states. [2020-10-27 05:40:57,303 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-27 05:41:00,359 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-27 05:41:01,071 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:41:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:02,717 INFO L93 Difference]: Finished difference Result 10223 states and 15377 transitions. [2020-10-27 05:41:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:41:02,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-27 05:41:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:02,737 INFO L225 Difference]: With dead ends: 10223 [2020-10-27 05:41:02,738 INFO L226 Difference]: Without dead ends: 8589 [2020-10-27 05:41:02,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:41:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8589 states. [2020-10-27 05:41:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8589 to 2209. [2020-10-27 05:41:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-10-27 05:41:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3221 transitions. [2020-10-27 05:41:03,181 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3221 transitions. Word has length 58 [2020-10-27 05:41:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:03,181 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 3221 transitions. [2020-10-27 05:41:03,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:41:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3221 transitions. [2020-10-27 05:41:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:41:03,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:03,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:03,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:41:03,186 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash -586040499, now seen corresponding path program 1 times [2020-10-27 05:41:03,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:03,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296077312] [2020-10-27 05:41:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3229 [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:41:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:41:06,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:07,139 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:41:07,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:07,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:07,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296077312] [2020-10-27 05:41:07,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:07,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:41:07,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744465892] [2020-10-27 05:41:07,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:41:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:41:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:41:07,193 INFO L87 Difference]: Start difference. First operand 2209 states and 3221 transitions. Second operand 6 states. [2020-10-27 05:41:07,919 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 05:41:09,911 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:41:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:10,242 INFO L93 Difference]: Finished difference Result 4476 states and 6630 transitions. [2020-10-27 05:41:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:41:10,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:41:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:10,249 INFO L225 Difference]: With dead ends: 4476 [2020-10-27 05:41:10,250 INFO L226 Difference]: Without dead ends: 2665 [2020-10-27 05:41:10,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:41:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2020-10-27 05:41:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1941. [2020-10-27 05:41:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-10-27 05:41:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2827 transitions. [2020-10-27 05:41:10,669 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2827 transitions. Word has length 71 [2020-10-27 05:41:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 2827 transitions. [2020-10-27 05:41:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:41:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2827 transitions. [2020-10-27 05:41:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:41:10,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:10,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:10,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:41:10,673 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2067309488, now seen corresponding path program 1 times [2020-10-27 05:41:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:10,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454491488] [2020-10-27 05:41:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:10,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4188 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:41:14,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:15,557 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:41:15,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:15,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:15,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:15,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454491488] [2020-10-27 05:41:15,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:15,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:41:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972706914] [2020-10-27 05:41:15,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:41:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:41:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:41:15,603 INFO L87 Difference]: Start difference. First operand 1941 states and 2827 transitions. Second operand 6 states. [2020-10-27 05:41:18,261 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:41:19,011 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:41:19,862 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:41:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:20,497 INFO L93 Difference]: Finished difference Result 6187 states and 9138 transitions. [2020-10-27 05:41:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:41:20,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:41:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:20,507 INFO L225 Difference]: With dead ends: 6187 [2020-10-27 05:41:20,508 INFO L226 Difference]: Without dead ends: 4354 [2020-10-27 05:41:20,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:41:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2020-10-27 05:41:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3877. [2020-10-27 05:41:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3877 states. [2020-10-27 05:41:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5674 transitions. [2020-10-27 05:41:21,359 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5674 transitions. Word has length 71 [2020-10-27 05:41:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:21,359 INFO L481 AbstractCegarLoop]: Abstraction has 3877 states and 5674 transitions. [2020-10-27 05:41:21,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:41:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5674 transitions. [2020-10-27 05:41:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:41:21,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:21,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:21,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:41:21,365 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 357936173, now seen corresponding path program 1 times [2020-10-27 05:41:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:21,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772677519] [2020-10-27 05:41:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:21,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:25,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:41:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:27,148 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:41:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:27,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:27,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:27,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772677519] [2020-10-27 05:41:27,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:27,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:41:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142071315] [2020-10-27 05:41:27,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:41:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:41:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:41:27,212 INFO L87 Difference]: Start difference. First operand 3877 states and 5674 transitions. Second operand 10 states. [2020-10-27 05:41:28,038 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-27 05:41:31,545 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:41:32,362 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:41:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:33,672 INFO L93 Difference]: Finished difference Result 10655 states and 15815 transitions. [2020-10-27 05:41:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:41:33,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-27 05:41:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:33,689 INFO L225 Difference]: With dead ends: 10655 [2020-10-27 05:41:33,689 INFO L226 Difference]: Without dead ends: 8493 [2020-10-27 05:41:33,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:41:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2020-10-27 05:41:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 5719. [2020-10-27 05:41:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5719 states. [2020-10-27 05:41:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8405 transitions. [2020-10-27 05:41:35,105 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8405 transitions. Word has length 72 [2020-10-27 05:41:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:35,105 INFO L481 AbstractCegarLoop]: Abstraction has 5719 states and 8405 transitions. [2020-10-27 05:41:35,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:41:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8405 transitions. [2020-10-27 05:41:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:41:35,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:35,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:35,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:41:35,112 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 267647585, now seen corresponding path program 1 times [2020-10-27 05:41:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:35,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543300383] [2020-10-27 05:41:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:35,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:41:40,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:40,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:41:40,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:40,935 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:41:40,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:40,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:40,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:40,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:40,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:40,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543300383] [2020-10-27 05:41:40,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:40,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:41:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779453925] [2020-10-27 05:41:40,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:41:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:41:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:41:40,997 INFO L87 Difference]: Start difference. First operand 5719 states and 8405 transitions. Second operand 9 states. [2020-10-27 05:41:41,835 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:41:45,623 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:41:46,449 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:41:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:48,280 INFO L93 Difference]: Finished difference Result 13914 states and 20548 transitions. [2020-10-27 05:41:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:41:48,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-27 05:41:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:48,298 INFO L225 Difference]: With dead ends: 13914 [2020-10-27 05:41:48,299 INFO L226 Difference]: Without dead ends: 12238 [2020-10-27 05:41:48,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:41:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12238 states. [2020-10-27 05:41:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12238 to 5719. [2020-10-27 05:41:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5719 states. [2020-10-27 05:41:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8403 transitions. [2020-10-27 05:41:49,774 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8403 transitions. Word has length 72 [2020-10-27 05:41:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:49,775 INFO L481 AbstractCegarLoop]: Abstraction has 5719 states and 8403 transitions. [2020-10-27 05:41:49,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:41:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8403 transitions. [2020-10-27 05:41:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:41:49,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:49,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:49,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:41:49,784 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1721946284, now seen corresponding path program 1 times [2020-10-27 05:41:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:49,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357099001] [2020-10-27 05:41:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:49,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:50,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:53,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3769 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:41:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:54,329 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:41:54,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:54,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:54,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357099001] [2020-10-27 05:41:54,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:54,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:41:54,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631997329] [2020-10-27 05:41:54,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:41:54,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:41:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:41:54,389 INFO L87 Difference]: Start difference. First operand 5719 states and 8403 transitions. Second operand 10 states. [2020-10-27 05:41:55,160 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:41:58,727 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:41:59,464 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:42:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:01,186 INFO L93 Difference]: Finished difference Result 14380 states and 21316 transitions. [2020-10-27 05:42:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:42:01,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-27 05:42:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:01,200 INFO L225 Difference]: With dead ends: 14380 [2020-10-27 05:42:01,200 INFO L226 Difference]: Without dead ends: 10559 [2020-10-27 05:42:01,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:42:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states.