/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.4.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:17:37,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:17:37,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:17:37,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:17:37,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:17:37,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:17:37,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:17:37,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:17:37,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:17:37,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:17:37,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:17:37,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:17:37,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:17:37,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:17:37,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:17:37,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:17:37,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:17:37,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:17:37,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:17:37,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:17:37,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:17:37,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:17:37,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:17:37,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:17:37,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:17:37,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:17:37,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:17:37,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:17:37,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:17:37,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:17:37,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:17:37,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:17:37,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:17:37,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:17:37,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:17:37,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:17:37,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:17:37,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:17:37,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:17:37,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:17:37,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:17:37,323 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 05:17:37,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:17:37,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:17:37,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:17:37,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:17:37,393 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:17:37,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:17:37,394 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:17:37,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:17:37,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:17:37,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:17:37,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:17:37,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:17:37,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:17:37,397 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:17:37,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:17:37,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:17:37,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:17:37,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:17:37,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:17:37,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:17:37,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:17:37,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:17:37,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:17:37,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:17:37,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:17:37,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:17:37,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:17:37,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:17:37,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:17:37,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:17:37,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:17:37,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:17:37,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:17:37,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:17:37,901 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:17:37,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:17:37,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c31b00c6/d176740de40f4552aee0406b2ab230e1/FLAG04415316c [2020-10-27 05:17:38,855 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:17:38,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:17:38,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c31b00c6/d176740de40f4552aee0406b2ab230e1/FLAG04415316c [2020-10-27 05:17:38,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c31b00c6/d176740de40f4552aee0406b2ab230e1 [2020-10-27 05:17:38,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:17:39,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:17:39,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:17:39,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:17:39,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:17:39,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:17:38" (1/1) ... [2020-10-27 05:17:39,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41614255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:39, skipping insertion in model container [2020-10-27 05:17:39,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:17:38" (1/1) ... [2020-10-27 05:17:39,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:17:39,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:17:39,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:17:39,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:17:40,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:17:40,313 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:17:40,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40 WrapperNode [2020-10-27 05:17:40,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:17:40,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:17:40,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:17:40,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:17:40,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (1/1) ... [2020-10-27 05:17:40,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:17:40,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:17:40,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:17:40,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:17:40,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (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 05:17:40,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:17:40,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:17:40,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:17:40,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:17:40,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:17:40,604 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:17:40,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:17:40,604 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:17:40,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:17:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:17:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:17:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:17:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:17:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:17:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:17:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:17:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:17:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:17:43,509 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:17:43,509 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:17:43,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:17:43 BoogieIcfgContainer [2020-10-27 05:17:43,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:17:43,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:17:43,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:17:43,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:17:43,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:17:38" (1/3) ... [2020-10-27 05:17:43,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2043dcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:17:43, skipping insertion in model container [2020-10-27 05:17:43,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:17:40" (2/3) ... [2020-10-27 05:17:43,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2043dcbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:17:43, skipping insertion in model container [2020-10-27 05:17:43,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:17:43" (3/3) ... [2020-10-27 05:17:43,522 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:17:43,535 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:17:43,541 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:17:43,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:17:43,589 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:17:43,589 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:17:43,589 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:17:43,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:17:43,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:17:43,590 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:17:43,590 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:17:43,590 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:17:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states. [2020-10-27 05:17:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:17:43,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:43,641 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] [2020-10-27 05:17:43,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1538837680, now seen corresponding path program 1 times [2020-10-27 05:17:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:43,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601893149] [2020-10-27 05:17:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:44,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:48,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:49,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:49,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:17:49,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:17:49,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 05:17:49,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:17:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:17:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:17:49,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:17:50,059 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:17:50,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:17:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:50,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:17:50,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:17:50,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:17:50,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 05:17:50,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:17:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:17:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:17:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:17:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:17:50,191 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 05:17:50,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601893149] [2020-10-27 05:17:50,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:17:50,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:17:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953249371] [2020-10-27 05:17:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:17:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:17:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:17:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:17:50,218 INFO L87 Difference]: Start difference. First operand 546 states. Second operand 6 states. [2020-10-27 05:17:51,131 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:17:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:17:55,039 INFO L93 Difference]: Finished difference Result 683 states and 1200 transitions. [2020-10-27 05:17:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:17:55,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-27 05:17:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:17:55,079 INFO L225 Difference]: With dead ends: 683 [2020-10-27 05:17:55,079 INFO L226 Difference]: Without dead ends: 383 [2020-10-27 05:17:55,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:17:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-27 05:17:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2020-10-27 05:17:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 05:17:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 494 transitions. [2020-10-27 05:17:55,180 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 494 transitions. Word has length 64 [2020-10-27 05:17:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:17:55,181 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 494 transitions. [2020-10-27 05:17:55,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:17:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 494 transitions. [2020-10-27 05:17:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:17:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:17:55,192 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] [2020-10-27 05:17:55,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:17:55,194 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:17:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:17:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash 360505821, now seen corresponding path program 1 times [2020-10-27 05:17:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:17:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571749541] [2020-10-27 05:17:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:17:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:17:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:57,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:17:57,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:00,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:00,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:18:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:01,791 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:18:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:01,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:01,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:01,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:01,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:18:01,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:01,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:01,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:01,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:01,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:01,897 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 05:18:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571749541] [2020-10-27 05:18:01,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:01,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:18:01,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073421843] [2020-10-27 05:18:01,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:18:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:18:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:18:01,901 INFO L87 Difference]: Start difference. First operand 383 states and 494 transitions. Second operand 15 states. [2020-10-27 05:18:02,050 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-27 05:18:04,310 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 254 DAG size of output: 252 [2020-10-27 05:18:05,219 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-10-27 05:18:11,765 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 245 DAG size of output: 244 [2020-10-27 05:18:13,289 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:18:15,345 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 240 DAG size of output: 239 [2020-10-27 05:18:16,325 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:18:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:17,477 INFO L93 Difference]: Finished difference Result 898 states and 1183 transitions. [2020-10-27 05:18:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:18:17,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-27 05:18:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:17,487 INFO L225 Difference]: With dead ends: 898 [2020-10-27 05:18:17,487 INFO L226 Difference]: Without dead ends: 832 [2020-10-27 05:18:17,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:18:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2020-10-27 05:18:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 400. [2020-10-27 05:18:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-27 05:18:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 517 transitions. [2020-10-27 05:18:17,545 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 517 transitions. Word has length 64 [2020-10-27 05:18:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:17,546 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 517 transitions. [2020-10-27 05:18:17,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:18:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 517 transitions. [2020-10-27 05:18:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:18:17,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:17,548 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] [2020-10-27 05:18:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:18:17,549 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1793701064, now seen corresponding path program 1 times [2020-10-27 05:18:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:17,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905454492] [2020-10-27 05:18:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:18,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:19,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:20,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:20,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:22,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:22,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:18:22,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:18:22,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:18:22,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:22,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:18:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:22,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:18:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:23,769 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:18:23,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:23,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:23,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:23,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:18:23,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:23,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:23,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:23,899 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 05:18:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905454492] [2020-10-27 05:18:23,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:23,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:18:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084878336] [2020-10-27 05:18:23,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:18:23,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:18:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:18:23,904 INFO L87 Difference]: Start difference. First operand 400 states and 517 transitions. Second operand 11 states. [2020-10-27 05:18:25,948 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 247 DAG size of output: 245 [2020-10-27 05:18:31,400 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 245 DAG size of output: 239 [2020-10-27 05:18:32,638 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:18:33,615 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:18:36,973 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 242 DAG size of output: 240 [2020-10-27 05:18:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:37,387 INFO L93 Difference]: Finished difference Result 1141 states and 1561 transitions. [2020-10-27 05:18:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:18:37,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-10-27 05:18:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:37,395 INFO L225 Difference]: With dead ends: 1141 [2020-10-27 05:18:37,396 INFO L226 Difference]: Without dead ends: 995 [2020-10-27 05:18:37,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:18:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-10-27 05:18:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 600. [2020-10-27 05:18:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-27 05:18:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 821 transitions. [2020-10-27 05:18:37,466 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 821 transitions. Word has length 64 [2020-10-27 05:18:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:37,466 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 821 transitions. [2020-10-27 05:18:37,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:18:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 821 transitions. [2020-10-27 05:18:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:18:37,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:37,469 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] [2020-10-27 05:18:37,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:18:37,469 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash -582991611, now seen corresponding path program 1 times [2020-10-27 05:18:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:37,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39984886] [2020-10-27 05:18:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:37,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:38,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:38,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:39,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:40,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:40,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:42,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:42,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:18:42,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:18:42,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:18:42,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:42,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:18:42,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:18:42,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:18:42,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:43,721 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:18:43,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:18:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:43,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:43,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:18:43,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:18:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:18:43,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 05:18:43,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:18:43,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:18:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:18:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:18:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:18:43,838 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 05:18:43,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39984886] [2020-10-27 05:18:43,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:18:43,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:18:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548047816] [2020-10-27 05:18:43,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:18:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:18:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:18:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:18:43,842 INFO L87 Difference]: Start difference. First operand 600 states and 821 transitions. Second operand 12 states. [2020-10-27 05:18:46,041 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 249 DAG size of output: 247 [2020-10-27 05:18:52,070 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 247 DAG size of output: 245 [2020-10-27 05:18:53,200 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:18:55,090 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 244 DAG size of output: 243 [2020-10-27 05:18:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:18:56,174 INFO L93 Difference]: Finished difference Result 1240 states and 1714 transitions. [2020-10-27 05:18:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:18:56,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-27 05:18:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:18:56,183 INFO L225 Difference]: With dead ends: 1240 [2020-10-27 05:18:56,183 INFO L226 Difference]: Without dead ends: 1221 [2020-10-27 05:18:56,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:18:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2020-10-27 05:18:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 597. [2020-10-27 05:18:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-27 05:18:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 816 transitions. [2020-10-27 05:18:56,264 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 816 transitions. Word has length 64 [2020-10-27 05:18:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:18:56,265 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 816 transitions. [2020-10-27 05:18:56,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:18:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 816 transitions. [2020-10-27 05:18:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:18:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:18:56,268 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] [2020-10-27 05:18:56,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:18:56,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:18:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:18:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash -103339727, now seen corresponding path program 1 times [2020-10-27 05:18:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:18:56,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817759291] [2020-10-27 05:18:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:18:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:18:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:56,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:57,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:18:59,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:01,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:01,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:19:01,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:19:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:19:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:19:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:19:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:02,386 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:19:02,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:02,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:02,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:02,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:02,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:02,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:19:02,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:02,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:02,471 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 05:19:02,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817759291] [2020-10-27 05:19:02,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:02,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:19:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706832685] [2020-10-27 05:19:02,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:19:02,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:19:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:02,474 INFO L87 Difference]: Start difference. First operand 597 states and 816 transitions. Second operand 10 states. [2020-10-27 05:19:03,650 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:19:06,596 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:19:07,682 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:19:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:09,189 INFO L93 Difference]: Finished difference Result 1392 states and 1990 transitions. [2020-10-27 05:19:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:19:09,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-27 05:19:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:09,196 INFO L225 Difference]: With dead ends: 1392 [2020-10-27 05:19:09,196 INFO L226 Difference]: Without dead ends: 1071 [2020-10-27 05:19:09,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:19:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2020-10-27 05:19:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 702. [2020-10-27 05:19:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-27 05:19:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 994 transitions. [2020-10-27 05:19:09,287 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 994 transitions. Word has length 65 [2020-10-27 05:19:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:09,287 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 994 transitions. [2020-10-27 05:19:09,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:19:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 994 transitions. [2020-10-27 05:19:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:19:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:09,289 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] [2020-10-27 05:19:09,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:19:09,290 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash 418288078, now seen corresponding path program 1 times [2020-10-27 05:19:09,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:09,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566796516] [2020-10-27 05:19:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:09,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:10,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:12,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:14,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:14,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:19:14,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:19:14,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:19:14,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:14,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:19:14,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:14,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:19:14,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:15,345 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:19:15,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:15,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:15,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:15,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:15,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:15,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:15,427 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 05:19:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566796516] [2020-10-27 05:19:15,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:15,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:19:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359617114] [2020-10-27 05:19:15,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:19:15,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:19:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:19:15,435 INFO L87 Difference]: Start difference. First operand 702 states and 994 transitions. Second operand 10 states. [2020-10-27 05:19:16,462 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:19:19,293 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:19:20,555 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:19:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:21,936 INFO L93 Difference]: Finished difference Result 2146 states and 3188 transitions. [2020-10-27 05:19:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:19:21,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-27 05:19:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:21,946 INFO L225 Difference]: With dead ends: 2146 [2020-10-27 05:19:21,947 INFO L226 Difference]: Without dead ends: 1809 [2020-10-27 05:19:21,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:19:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-10-27 05:19:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 702. [2020-10-27 05:19:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-10-27 05:19:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 992 transitions. [2020-10-27 05:19:22,051 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 992 transitions. Word has length 65 [2020-10-27 05:19:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:22,052 INFO L481 AbstractCegarLoop]: Abstraction has 702 states and 992 transitions. [2020-10-27 05:19:22,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:19:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 992 transitions. [2020-10-27 05:19:22,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:19:22,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:22,054 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] [2020-10-27 05:19:22,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:19:22,054 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:22,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1801696695, now seen corresponding path program 1 times [2020-10-27 05:19:22,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:22,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957371333] [2020-10-27 05:19:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:22,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:27,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:19:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:27,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:19:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:28,105 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:19:28,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:28,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:28,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:28,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:28,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:28,167 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 05:19:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957371333] [2020-10-27 05:19:28,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:28,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:19:28,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246240469] [2020-10-27 05:19:28,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:19:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:19:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:19:28,170 INFO L87 Difference]: Start difference. First operand 702 states and 992 transitions. Second operand 13 states. [2020-10-27 05:19:29,387 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 246 [2020-10-27 05:19:33,513 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:19:34,688 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:19:35,519 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:19:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:36,605 INFO L93 Difference]: Finished difference Result 1154 states and 1629 transitions. [2020-10-27 05:19:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:19:36,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-27 05:19:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:36,612 INFO L225 Difference]: With dead ends: 1154 [2020-10-27 05:19:36,612 INFO L226 Difference]: Without dead ends: 932 [2020-10-27 05:19:36,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:19:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2020-10-27 05:19:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 712. [2020-10-27 05:19:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-27 05:19:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1006 transitions. [2020-10-27 05:19:36,702 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1006 transitions. Word has length 65 [2020-10-27 05:19:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:36,703 INFO L481 AbstractCegarLoop]: Abstraction has 712 states and 1006 transitions. [2020-10-27 05:19:36,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:19:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1006 transitions. [2020-10-27 05:19:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:19:36,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:36,704 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] [2020-10-27 05:19:36,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:19:36,705 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1776286202, now seen corresponding path program 1 times [2020-10-27 05:19:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:36,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444655355] [2020-10-27 05:19:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:36,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:39,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:39,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:41,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:41,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:19:41,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:42,751 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:19:42,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:42,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:42,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:42,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:42,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:42,818 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 05:19:42,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444655355] [2020-10-27 05:19:42,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:42,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:19:42,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430055587] [2020-10-27 05:19:42,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:19:42,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:19:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:19:42,820 INFO L87 Difference]: Start difference. First operand 712 states and 1006 transitions. Second operand 6 states. [2020-10-27 05:19:43,845 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 05:19:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:19:45,871 INFO L93 Difference]: Finished difference Result 1110 states and 1593 transitions. [2020-10-27 05:19:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:19:45,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 05:19:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:19:45,875 INFO L225 Difference]: With dead ends: 1110 [2020-10-27 05:19:45,876 INFO L226 Difference]: Without dead ends: 691 [2020-10-27 05:19:45,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:19:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-10-27 05:19:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 356. [2020-10-27 05:19:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-27 05:19:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 476 transitions. [2020-10-27 05:19:45,935 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 476 transitions. Word has length 65 [2020-10-27 05:19:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:19:45,935 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 476 transitions. [2020-10-27 05:19:45,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:19:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 476 transitions. [2020-10-27 05:19:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:19:45,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:19:45,936 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] [2020-10-27 05:19:45,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:19:45,937 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:19:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:19:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1790151958, now seen corresponding path program 1 times [2020-10-27 05:19:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:19:45,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808404705] [2020-10-27 05:19:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:19:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:50,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:19:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:19:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:52,241 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:19:52,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:19:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:19:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:19:52,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:19:52,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:19:52,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:19:52,309 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 05:19:52,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808404705] [2020-10-27 05:19:52,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:19:52,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:19:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268252157] [2020-10-27 05:19:52,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:19:52,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:19:52,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:19:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:19:52,312 INFO L87 Difference]: Start difference. First operand 356 states and 476 transitions. Second operand 14 states. [2020-10-27 05:19:54,691 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 249 DAG size of output: 248 [2020-10-27 05:20:00,284 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 240 DAG size of output: 239 [2020-10-27 05:20:01,413 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:20:02,591 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:20:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:04,816 INFO L93 Difference]: Finished difference Result 826 states and 1143 transitions. [2020-10-27 05:20:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:20:04,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-27 05:20:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:04,821 INFO L225 Difference]: With dead ends: 826 [2020-10-27 05:20:04,821 INFO L226 Difference]: Without dead ends: 818 [2020-10-27 05:20:04,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:20:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2020-10-27 05:20:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 356. [2020-10-27 05:20:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-27 05:20:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 474 transitions. [2020-10-27 05:20:04,882 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 474 transitions. Word has length 66 [2020-10-27 05:20:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:04,883 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 474 transitions. [2020-10-27 05:20:04,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:20:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 474 transitions. [2020-10-27 05:20:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:20:04,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:04,884 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] [2020-10-27 05:20:04,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:20:04,884 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:04,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2119704616, now seen corresponding path program 1 times [2020-10-27 05:20:04,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:04,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255239921] [2020-10-27 05:20:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:06,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:08,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:09,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:09,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:09,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:09,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:09,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:20:09,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:10,888 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:20:10,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:10,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:10,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:10,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:10,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:10,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:20:10,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:10,954 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 05:20:10,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255239921] [2020-10-27 05:20:10,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:10,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:20:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531928916] [2020-10-27 05:20:10,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:20:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:20:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:20:10,956 INFO L87 Difference]: Start difference. First operand 356 states and 474 transitions. Second operand 6 states. [2020-10-27 05:20:11,978 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:20:14,345 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:20:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:14,966 INFO L93 Difference]: Finished difference Result 744 states and 1021 transitions. [2020-10-27 05:20:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:20:14,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 05:20:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:14,970 INFO L225 Difference]: With dead ends: 744 [2020-10-27 05:20:14,970 INFO L226 Difference]: Without dead ends: 512 [2020-10-27 05:20:14,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:20:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-27 05:20:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 475. [2020-10-27 05:20:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-10-27 05:20:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 660 transitions. [2020-10-27 05:20:15,057 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 660 transitions. Word has length 66 [2020-10-27 05:20:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:15,057 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 660 transitions. [2020-10-27 05:20:15,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:20:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 660 transitions. [2020-10-27 05:20:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:20:15,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:15,059 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] [2020-10-27 05:20:15,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:20:15,059 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash 652605843, now seen corresponding path program 1 times [2020-10-27 05:20:15,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:15,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646101479] [2020-10-27 05:20:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:15,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:16,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:16,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:20,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:20,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:20:20,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:20:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:21,135 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:20:21,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:21,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:21,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:21,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:21,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:20:21,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:21,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:21,211 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 05:20:21,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646101479] [2020-10-27 05:20:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:20:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857933354] [2020-10-27 05:20:21,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:20:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:20:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:21,214 INFO L87 Difference]: Start difference. First operand 475 states and 660 transitions. Second operand 10 states. [2020-10-27 05:20:22,301 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:20:25,084 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:20:26,271 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:20:29,910 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 240 DAG size of output: 239 [2020-10-27 05:20:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:30,291 INFO L93 Difference]: Finished difference Result 952 states and 1359 transitions. [2020-10-27 05:20:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:20:30,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 05:20:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:30,297 INFO L225 Difference]: With dead ends: 952 [2020-10-27 05:20:30,297 INFO L226 Difference]: Without dead ends: 946 [2020-10-27 05:20:30,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:20:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-10-27 05:20:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 475. [2020-10-27 05:20:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-10-27 05:20:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 658 transitions. [2020-10-27 05:20:30,390 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 658 transitions. Word has length 66 [2020-10-27 05:20:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:30,391 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 658 transitions. [2020-10-27 05:20:30,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:20:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 658 transitions. [2020-10-27 05:20:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:20:30,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:30,392 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] [2020-10-27 05:20:30,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:20:30,393 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1341203046, now seen corresponding path program 1 times [2020-10-27 05:20:30,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:30,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116744829] [2020-10-27 05:20:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:30,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:31,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:35,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:20:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:20:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:36,892 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:20:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:36,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:36,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:36,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:36,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:20:36,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:36,955 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 05:20:36,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116744829] [2020-10-27 05:20:36,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:36,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:20:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523011664] [2020-10-27 05:20:36,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:20:36,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:36,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:20:36,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:20:36,958 INFO L87 Difference]: Start difference. First operand 475 states and 658 transitions. Second operand 17 states. [2020-10-27 05:20:37,145 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-27 05:20:39,525 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 257 DAG size of output: 253 [2020-10-27 05:20:45,900 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 245 DAG size of output: 241 [2020-10-27 05:20:47,290 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 243 [2020-10-27 05:20:48,377 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:20:49,541 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:20:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:20:50,773 INFO L93 Difference]: Finished difference Result 1270 states and 1777 transitions. [2020-10-27 05:20:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:20:50,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-27 05:20:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:20:50,777 INFO L225 Difference]: With dead ends: 1270 [2020-10-27 05:20:50,777 INFO L226 Difference]: Without dead ends: 1050 [2020-10-27 05:20:50,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 05:20:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-10-27 05:20:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 489. [2020-10-27 05:20:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 05:20:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 678 transitions. [2020-10-27 05:20:50,874 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 678 transitions. Word has length 66 [2020-10-27 05:20:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:20:50,874 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 678 transitions. [2020-10-27 05:20:50,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:20:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 678 transitions. [2020-10-27 05:20:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:20:50,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:20:50,876 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] [2020-10-27 05:20:50,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:20:50,876 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:20:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:20:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1011479250, now seen corresponding path program 1 times [2020-10-27 05:20:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:20:50,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466948961] [2020-10-27 05:20:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:20:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:50,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:51,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:51,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:51,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:52,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:55,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:20:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:20:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:20:55,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:20:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:20:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:20:55,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:56,948 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:20:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:20:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:20:56,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:20:56,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:20:56,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:20:56,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:20:56,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:20:57,003 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 05:20:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466948961] [2020-10-27 05:20:57,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:20:57,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:20:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785465314] [2020-10-27 05:20:57,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:20:57,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:20:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:20:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:20:57,005 INFO L87 Difference]: Start difference. First operand 489 states and 678 transitions. Second operand 10 states. [2020-10-27 05:20:58,156 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:21:00,899 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:21:01,991 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:21:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:03,601 INFO L93 Difference]: Finished difference Result 752 states and 1052 transitions. [2020-10-27 05:21:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:21:03,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 05:21:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:03,606 INFO L225 Difference]: With dead ends: 752 [2020-10-27 05:21:03,606 INFO L226 Difference]: Without dead ends: 746 [2020-10-27 05:21:03,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-27 05:21:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-10-27 05:21:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 489. [2020-10-27 05:21:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 05:21:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 676 transitions. [2020-10-27 05:21:03,708 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 676 transitions. Word has length 66 [2020-10-27 05:21:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:03,708 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 676 transitions. [2020-10-27 05:21:03,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 676 transitions. [2020-10-27 05:21:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:21:03,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:03,710 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] [2020-10-27 05:21:03,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:21:03,710 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -457192489, now seen corresponding path program 1 times [2020-10-27 05:21:03,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:03,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949007242] [2020-10-27 05:21:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:03,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:08,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:08,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:21:08,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:21:08,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:21:08,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:21:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:21:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:09,892 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 05:21:09,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:09,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:09,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:09,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:09,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:09,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:09,964 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 05:21:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949007242] [2020-10-27 05:21:09,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:09,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:21:09,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929184984] [2020-10-27 05:21:09,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:21:09,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:21:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:21:09,966 INFO L87 Difference]: Start difference. First operand 489 states and 676 transitions. Second operand 14 states. [2020-10-27 05:21:11,132 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 249 [2020-10-27 05:21:14,965 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:21:15,998 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 05:21:17,193 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:21:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:19,412 INFO L93 Difference]: Finished difference Result 1539 states and 2209 transitions. [2020-10-27 05:21:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:21:19,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-27 05:21:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:19,418 INFO L225 Difference]: With dead ends: 1539 [2020-10-27 05:21:19,418 INFO L226 Difference]: Without dead ends: 1522 [2020-10-27 05:21:19,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:21:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2020-10-27 05:21:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 489. [2020-10-27 05:21:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 05:21:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 674 transitions. [2020-10-27 05:21:19,531 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 674 transitions. Word has length 66 [2020-10-27 05:21:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:19,532 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 674 transitions. [2020-10-27 05:21:19,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:21:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 674 transitions. [2020-10-27 05:21:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:21:19,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:19,533 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] [2020-10-27 05:21:19,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:21:19,534 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash -820906843, now seen corresponding path program 1 times [2020-10-27 05:21:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:19,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243020892] [2020-10-27 05:21:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking...