/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:36:16,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:36:16,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:36:16,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:36:16,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:36:16,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:36:16,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:36:16,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:36:16,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:36:16,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:36:16,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:36:16,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:36:16,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:36:16,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:36:16,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:36:16,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:36:16,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:36:16,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:36:16,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:36:16,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:36:16,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:36:16,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:36:16,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:36:16,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:36:16,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:36:16,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:36:16,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:36:16,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:36:16,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:36:16,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:36:16,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:36:16,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:36:16,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:36:16,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:36:16,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:36:16,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:36:16,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:36:16,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:36:16,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:36:16,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:36:16,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:36:16,454 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 [2020-10-28 18:36:16,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:36:16,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:36:16,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:36:16,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:36:16,511 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:36:16,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:36:16,511 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:36:16,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:36:16,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:36:16,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:36:16,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:36:16,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:36:16,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:36:16,515 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:36:16,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:36:16,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:36:16,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:36:16,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:36:16,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:36:16,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:36:16,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:36:16,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:36:16,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:36:16,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:36:16,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:36:16,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:36:16,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:36:16,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:36:16,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:36:16,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:36:16,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:36:16,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:36:16,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:36:16,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:36:16,984 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:36:16,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:36:17,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1c981a5/4fd441904e294c849c18172de770a475/FLAGc1f00a8d3 [2020-10-28 18:36:17,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:36:17,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:36:17,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1c981a5/4fd441904e294c849c18172de770a475/FLAGc1f00a8d3 [2020-10-28 18:36:18,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1c981a5/4fd441904e294c849c18172de770a475 [2020-10-28 18:36:18,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:36:18,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:36:18,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:36:18,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:36:18,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:36:18,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:36:18" (1/1) ... [2020-10-28 18:36:18,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aae1318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:18, skipping insertion in model container [2020-10-28 18:36:18,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:36:18" (1/1) ... [2020-10-28 18:36:18,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:36:18,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:36:19,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:36:19,270 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:36:19,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:36:19,601 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:36:19,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19 WrapperNode [2020-10-28 18:36:19,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:36:19,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:36:19,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:36:19,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:36:19,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... [2020-10-28 18:36:19,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:36:19,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:36:19,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:36:19,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:36:19,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:36:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:36:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:36:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:36:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:36:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:36:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:36:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:36:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:36:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:36:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:36:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:36:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:36:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:36:22,456 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:36:22,456 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:36:22,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:36:22 BoogieIcfgContainer [2020-10-28 18:36:22,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:36:22,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:36:22,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:36:22,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:36:22,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:36:18" (1/3) ... [2020-10-28 18:36:22,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c166f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:36:22, skipping insertion in model container [2020-10-28 18:36:22,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:19" (2/3) ... [2020-10-28 18:36:22,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c166f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:36:22, skipping insertion in model container [2020-10-28 18:36:22,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:36:22" (3/3) ... [2020-10-28 18:36:22,471 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:36:22,485 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:36:22,491 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:36:22,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:36:22,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:36:22,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:36:22,542 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:36:22,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:36:22,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:36:22,543 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:36:22,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:36:22,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:36:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states. [2020-10-28 18:36:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:36:22,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:22,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:22,613 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1232942352, now seen corresponding path program 1 times [2020-10-28 18:36:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:22,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306355492] [2020-10-28 18:36:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:23,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:23,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:24,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:36:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:36:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:36:28,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:28,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:36:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:36:28,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:36:28,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:36:29,383 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:36:29,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:29,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:29,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:29,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:29,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:29,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 18:36:29,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:29,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:29,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:36:29,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:29,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:36:29,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:36:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:36:29,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306355492] [2020-10-28 18:36:29,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:36:29,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:36:29,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265651243] [2020-10-28 18:36:29,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:36:29,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:36:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:36:29,633 INFO L87 Difference]: Start difference. First operand 635 states. Second operand 7 states. [2020-10-28 18:36:30,543 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-28 18:36:36,845 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:36:38,664 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:36:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:36:38,805 INFO L93 Difference]: Finished difference Result 1298 states and 2259 transitions. [2020-10-28 18:36:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:36:38,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-10-28 18:36:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:36:38,843 INFO L225 Difference]: With dead ends: 1298 [2020-10-28 18:36:38,843 INFO L226 Difference]: Without dead ends: 942 [2020-10-28 18:36:38,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:36:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2020-10-28 18:36:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 617. [2020-10-28 18:36:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-28 18:36:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 782 transitions. [2020-10-28 18:36:38,987 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 782 transitions. Word has length 76 [2020-10-28 18:36:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:38,988 INFO L481 AbstractCegarLoop]: Abstraction has 617 states and 782 transitions. [2020-10-28 18:36:38,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:36:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 782 transitions. [2020-10-28 18:36:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:36:39,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:39,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:39,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:36:39,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1389176930, now seen corresponding path program 1 times [2020-10-28 18:36:39,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:39,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774780988] [2020-10-28 18:36:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:39,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:39,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:40,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:40,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:40,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:44,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:44,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:36:44,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:36:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:36:44,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:44,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:36:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:36:44,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:36:44,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:36:45,023 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:36:45,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:45,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:45,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:45,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:45,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 18:36:45,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:45,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:36:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:45,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:36:45,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:36:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:36:45,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774780988] [2020-10-28 18:36:45,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:36:45,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:36:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216816773] [2020-10-28 18:36:45,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:36:45,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:36:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:36:45,143 INFO L87 Difference]: Start difference. First operand 617 states and 782 transitions. Second operand 6 states. [2020-10-28 18:36:46,073 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:36:49,809 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:36:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:36:50,306 INFO L93 Difference]: Finished difference Result 961 states and 1247 transitions. [2020-10-28 18:36:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:36:50,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-28 18:36:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:36:50,315 INFO L225 Difference]: With dead ends: 961 [2020-10-28 18:36:50,315 INFO L226 Difference]: Without dead ends: 674 [2020-10-28 18:36:50,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:36:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-10-28 18:36:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 625. [2020-10-28 18:36:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-28 18:36:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 812 transitions. [2020-10-28 18:36:50,355 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 812 transitions. Word has length 76 [2020-10-28 18:36:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:36:50,355 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 812 transitions. [2020-10-28 18:36:50,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:36:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 812 transitions. [2020-10-28 18:36:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 18:36:50,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:50,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:50,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:36:50,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1601373387, now seen corresponding path program 1 times [2020-10-28 18:36:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:50,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306469736] [2020-10-28 18:36:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:50,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:50,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:50,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:51,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:51,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:55,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 18:36:55,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:36:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:36:55,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:55,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:36:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:36:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:36:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:36:56,628 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:36:56,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:36:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:56,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:36:56,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:36:56,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:36:56,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:36:56,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:36:56,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:36:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:36:56,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:36:56,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:36:56,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:36:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:36:56,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306469736] [2020-10-28 18:36:56,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:36:56,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:36:56,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271363599] [2020-10-28 18:36:56,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:36:56,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:36:56,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:36:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:36:56,742 INFO L87 Difference]: Start difference. First operand 625 states and 812 transitions. Second operand 8 states. [2020-10-28 18:36:57,746 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:37:00,807 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-28 18:37:01,812 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:37:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:02,323 INFO L93 Difference]: Finished difference Result 846 states and 1137 transitions. [2020-10-28 18:37:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:37:02,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-28 18:37:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:02,329 INFO L225 Difference]: With dead ends: 846 [2020-10-28 18:37:02,331 INFO L226 Difference]: Without dead ends: 591 [2020-10-28 18:37:02,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:37:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-28 18:37:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 495. [2020-10-28 18:37:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-28 18:37:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 631 transitions. [2020-10-28 18:37:02,372 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 631 transitions. Word has length 77 [2020-10-28 18:37:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:02,377 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 631 transitions. [2020-10-28 18:37:02,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 631 transitions. [2020-10-28 18:37:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 18:37:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:02,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:02,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:37:02,380 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1757607965, now seen corresponding path program 1 times [2020-10-28 18:37:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:02,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716487279] [2020-10-28 18:37:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:02,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:02,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:02,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:03,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:05,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:07,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:07,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 18:37:07,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:37:07,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:37:07,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:07,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:07,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:37:07,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:37:07,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:37:07,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 18:37:08,336 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:37:08,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:08,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:08,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:08,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:08,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:08,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:37:08,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:08,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:08,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:08,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716487279] [2020-10-28 18:37:08,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:08,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:37:08,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779985297] [2020-10-28 18:37:08,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:37:08,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:08,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:37:08,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:37:08,404 INFO L87 Difference]: Start difference. First operand 495 states and 631 transitions. Second operand 7 states. [2020-10-28 18:37:09,334 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:37:12,225 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:37:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:12,936 INFO L93 Difference]: Finished difference Result 868 states and 1157 transitions. [2020-10-28 18:37:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:37:12,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-28 18:37:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:12,940 INFO L225 Difference]: With dead ends: 868 [2020-10-28 18:37:12,941 INFO L226 Difference]: Without dead ends: 591 [2020-10-28 18:37:12,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:37:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-28 18:37:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 495. [2020-10-28 18:37:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-28 18:37:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 630 transitions. [2020-10-28 18:37:12,979 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 630 transitions. Word has length 77 [2020-10-28 18:37:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:12,979 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 630 transitions. [2020-10-28 18:37:12,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:37:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 630 transitions. [2020-10-28 18:37:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:37:12,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:12,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:12,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:37:12,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash 820105755, now seen corresponding path program 1 times [2020-10-28 18:37:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:12,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775545803] [2020-10-28 18:37:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:17,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:17,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:18,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:37:18,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:37:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:37:18,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:18,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:37:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:18,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:37:18,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:19,006 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:37:19,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:19,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:19,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:19,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 18:37:19,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:19,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:19,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:19,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775545803] [2020-10-28 18:37:19,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:19,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:37:19,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558559202] [2020-10-28 18:37:19,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:37:19,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:19,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:37:19,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:37:19,162 INFO L87 Difference]: Start difference. First operand 495 states and 630 transitions. Second operand 6 states. [2020-10-28 18:37:20,112 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:37:22,539 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:37:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:23,056 INFO L93 Difference]: Finished difference Result 971 states and 1307 transitions. [2020-10-28 18:37:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:37:23,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 18:37:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:23,065 INFO L225 Difference]: With dead ends: 971 [2020-10-28 18:37:23,065 INFO L226 Difference]: Without dead ends: 623 [2020-10-28 18:37:23,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:37:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-28 18:37:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 586. [2020-10-28 18:37:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-28 18:37:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 790 transitions. [2020-10-28 18:37:23,117 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 790 transitions. Word has length 79 [2020-10-28 18:37:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:23,117 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 790 transitions. [2020-10-28 18:37:23,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:37:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 790 transitions. [2020-10-28 18:37:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:37:23,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:23,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:23,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:37:23,119 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash 828652638, now seen corresponding path program 1 times [2020-10-28 18:37:23,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:23,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069929432] [2020-10-28 18:37:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:23,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:23,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:23,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:24,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:27,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:27,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:27,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:28,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:37:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:29,042 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:37:29,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:29,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:29,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:29,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:29,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069929432] [2020-10-28 18:37:29,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:29,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:37:29,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588981025] [2020-10-28 18:37:29,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:29,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:29,140 INFO L87 Difference]: Start difference. First operand 586 states and 790 transitions. Second operand 8 states. [2020-10-28 18:37:30,025 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:37:32,641 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:37:34,327 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:37:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:34,471 INFO L93 Difference]: Finished difference Result 2160 states and 3163 transitions. [2020-10-28 18:37:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:37:34,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 18:37:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:34,483 INFO L225 Difference]: With dead ends: 2160 [2020-10-28 18:37:34,483 INFO L226 Difference]: Without dead ends: 1806 [2020-10-28 18:37:34,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:37:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2020-10-28 18:37:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 602. [2020-10-28 18:37:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-28 18:37:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 806 transitions. [2020-10-28 18:37:34,573 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 806 transitions. Word has length 80 [2020-10-28 18:37:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:34,574 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 806 transitions. [2020-10-28 18:37:34,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 806 transitions. [2020-10-28 18:37:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:37:34,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:34,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:34,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:37:34,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1395070368, now seen corresponding path program 1 times [2020-10-28 18:37:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:34,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151839038] [2020-10-28 18:37:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:34,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:35,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:35,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:35,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:39,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:37:39,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:40,524 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:37:40,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:40,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:40,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:40,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151839038] [2020-10-28 18:37:40,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:37:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564489656] [2020-10-28 18:37:40,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:40,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:40,635 INFO L87 Difference]: Start difference. First operand 602 states and 806 transitions. Second operand 8 states. [2020-10-28 18:37:41,542 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:37:44,129 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:37:46,129 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:37:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:46,339 INFO L93 Difference]: Finished difference Result 1958 states and 2830 transitions. [2020-10-28 18:37:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:37:46,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 18:37:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:46,347 INFO L225 Difference]: With dead ends: 1958 [2020-10-28 18:37:46,347 INFO L226 Difference]: Without dead ends: 1652 [2020-10-28 18:37:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:37:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2020-10-28 18:37:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 640. [2020-10-28 18:37:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-28 18:37:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 851 transitions. [2020-10-28 18:37:46,435 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 851 transitions. Word has length 80 [2020-10-28 18:37:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:46,435 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 851 transitions. [2020-10-28 18:37:46,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 851 transitions. [2020-10-28 18:37:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 18:37:46,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:46,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:46,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:37:46,438 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -366513196, now seen corresponding path program 1 times [2020-10-28 18:37:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:46,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000419456] [2020-10-28 18:37:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:46,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:49,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:49,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:51,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:51,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 18:37:51,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 18:37:51,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:37:51,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:51,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:51,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:51,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:51,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 18:37:51,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:52,387 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:37:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:52,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:52,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:52,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:52,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000419456] [2020-10-28 18:37:52,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:52,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:37:52,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381051562] [2020-10-28 18:37:52,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:52,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:52,453 INFO L87 Difference]: Start difference. First operand 640 states and 851 transitions. Second operand 8 states. [2020-10-28 18:37:53,339 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:37:55,961 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:37:57,969 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:37:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:58,158 INFO L93 Difference]: Finished difference Result 2559 states and 3662 transitions. [2020-10-28 18:37:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:37:58,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 18:37:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:58,168 INFO L225 Difference]: With dead ends: 2559 [2020-10-28 18:37:58,169 INFO L226 Difference]: Without dead ends: 2106 [2020-10-28 18:37:58,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:37:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-10-28 18:37:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 680. [2020-10-28 18:37:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-28 18:37:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 891 transitions. [2020-10-28 18:37:58,267 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 891 transitions. Word has length 80 [2020-10-28 18:37:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:58,267 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 891 transitions. [2020-10-28 18:37:58,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 891 transitions. [2020-10-28 18:37:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:37:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:58,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:58,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:37:58,270 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -276669585, now seen corresponding path program 1 times [2020-10-28 18:37:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:58,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112117220] [2020-10-28 18:37:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:58,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:58,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:03,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:03,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:38:03,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:38:03,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:38:03,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:03,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:38:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:38:03,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:38:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:04,178 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:04,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:04,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:04,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:04,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:04,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 18:38:04,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:04,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:38:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:04,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112117220] [2020-10-28 18:38:04,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:04,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:38:04,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537763968] [2020-10-28 18:38:04,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:38:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:04,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:38:04,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:38:04,266 INFO L87 Difference]: Start difference. First operand 680 states and 891 transitions. Second operand 6 states. [2020-10-28 18:38:05,199 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:38:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:07,146 INFO L93 Difference]: Finished difference Result 1056 states and 1435 transitions. [2020-10-28 18:38:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:38:07,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 18:38:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:07,149 INFO L225 Difference]: With dead ends: 1056 [2020-10-28 18:38:07,149 INFO L226 Difference]: Without dead ends: 574 [2020-10-28 18:38:07,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:38:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-28 18:38:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2020-10-28 18:38:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-10-28 18:38:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 764 transitions. [2020-10-28 18:38:07,226 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 764 transitions. Word has length 81 [2020-10-28 18:38:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:07,226 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 764 transitions. [2020-10-28 18:38:07,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:38:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 764 transitions. [2020-10-28 18:38:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:38:07,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:07,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:07,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:38:07,228 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1534767951, now seen corresponding path program 1 times [2020-10-28 18:38:07,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:07,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906243290] [2020-10-28 18:38:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:07,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:07,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:07,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:09,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:12,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:12,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:38:12,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:38:12,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 18:38:12,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:12,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:38:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:38:12,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:38:12,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:13,174 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:13,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:13,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:38:13,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:13,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906243290] [2020-10-28 18:38:13,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:13,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:38:13,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550752351] [2020-10-28 18:38:13,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:38:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:38:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:38:13,244 INFO L87 Difference]: Start difference. First operand 574 states and 764 transitions. Second operand 6 states. [2020-10-28 18:38:14,165 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:38:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:15,924 INFO L93 Difference]: Finished difference Result 944 states and 1292 transitions. [2020-10-28 18:38:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:38:15,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 18:38:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:15,927 INFO L225 Difference]: With dead ends: 944 [2020-10-28 18:38:15,927 INFO L226 Difference]: Without dead ends: 516 [2020-10-28 18:38:15,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:38:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-28 18:38:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2020-10-28 18:38:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:38:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 695 transitions. [2020-10-28 18:38:15,999 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 695 transitions. Word has length 81 [2020-10-28 18:38:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:15,999 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 695 transitions. [2020-10-28 18:38:16,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:38:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 695 transitions. [2020-10-28 18:38:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:38:16,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:16,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:16,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:38:16,002 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1295532612, now seen corresponding path program 1 times [2020-10-28 18:38:16,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:16,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819402184] [2020-10-28 18:38:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:17,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:21,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:21,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:38:21,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:38:21,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:38:21,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:21,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:38:21,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 18:38:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:22,006 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:22,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:22,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:22,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:22,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:22,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:22,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:22,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819402184] [2020-10-28 18:38:22,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:22,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:38:22,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407534555] [2020-10-28 18:38:22,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:22,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:22,071 INFO L87 Difference]: Start difference. First operand 516 states and 695 transitions. Second operand 8 states. [2020-10-28 18:38:23,049 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:38:25,324 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:38:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:26,654 INFO L93 Difference]: Finished difference Result 1274 states and 1809 transitions. [2020-10-28 18:38:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:38:26,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-28 18:38:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:26,659 INFO L225 Difference]: With dead ends: 1274 [2020-10-28 18:38:26,659 INFO L226 Difference]: Without dead ends: 1033 [2020-10-28 18:38:26,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:38:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-28 18:38:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 516. [2020-10-28 18:38:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:38:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 694 transitions. [2020-10-28 18:38:26,746 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 694 transitions. Word has length 82 [2020-10-28 18:38:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:26,746 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 694 transitions. [2020-10-28 18:38:26,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 694 transitions. [2020-10-28 18:38:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:38:26,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:26,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:26,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:38:26,748 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1621221923, now seen corresponding path program 1 times [2020-10-28 18:38:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:26,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500096758] [2020-10-28 18:38:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:26,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:26,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:27,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:27,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:30,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:30,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:31,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:31,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:38:31,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:38:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:38:31,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:31,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:38:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:38:31,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:32,722 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:32,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:32,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:32,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:32,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:32,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500096758] [2020-10-28 18:38:32,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:32,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:38:32,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103245637] [2020-10-28 18:38:32,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:32,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:32,792 INFO L87 Difference]: Start difference. First operand 516 states and 694 transitions. Second operand 8 states. [2020-10-28 18:38:33,738 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:38:36,082 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:38:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:37,533 INFO L93 Difference]: Finished difference Result 1572 states and 2246 transitions. [2020-10-28 18:38:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:38:37,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-28 18:38:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:37,543 INFO L225 Difference]: With dead ends: 1572 [2020-10-28 18:38:37,544 INFO L226 Difference]: Without dead ends: 1320 [2020-10-28 18:38:37,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:38:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-10-28 18:38:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 516. [2020-10-28 18:38:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:38:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 693 transitions. [2020-10-28 18:38:37,658 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 693 transitions. Word has length 82 [2020-10-28 18:38:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:37,659 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 693 transitions. [2020-10-28 18:38:37,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 693 transitions. [2020-10-28 18:38:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:38:37,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:37,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:37,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:38:37,661 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -729114882, now seen corresponding path program 1 times [2020-10-28 18:38:37,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:37,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061062524] [2020-10-28 18:38:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:38,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:42,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:42,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 18:38:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:43,635 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:43,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:43,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:43,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061062524] [2020-10-28 18:38:43,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:43,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:38:43,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227227004] [2020-10-28 18:38:43,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:43,683 INFO L87 Difference]: Start difference. First operand 516 states and 693 transitions. Second operand 8 states. [2020-10-28 18:38:44,640 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:38:46,958 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:38:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:47,982 INFO L93 Difference]: Finished difference Result 1637 states and 2327 transitions. [2020-10-28 18:38:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:38:47,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-28 18:38:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:47,990 INFO L225 Difference]: With dead ends: 1637 [2020-10-28 18:38:47,990 INFO L226 Difference]: Without dead ends: 1336 [2020-10-28 18:38:47,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:38:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2020-10-28 18:38:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 516. [2020-10-28 18:38:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:38:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 692 transitions. [2020-10-28 18:38:48,096 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 692 transitions. Word has length 82 [2020-10-28 18:38:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:48,097 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 692 transitions. [2020-10-28 18:38:48,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 692 transitions. [2020-10-28 18:38:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:38:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:48,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:48,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:38:48,098 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:48,099 INFO L82 PathProgramCache]: Analyzing trace with hash 777379128, now seen corresponding path program 1 times [2020-10-28 18:38:48,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:48,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583190051] [2020-10-28 18:38:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:48,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:49,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:49,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:52,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:53,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:53,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:38:53,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:38:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:38:53,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:53,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:38:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:38:53,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 18:38:53,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:54,045 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:38:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:54,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:54,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:54,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:54,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 18:38:54,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:54,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:38:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:38:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:54,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583190051] [2020-10-28 18:38:54,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:38:54,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:38:54,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213418581] [2020-10-28 18:38:54,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:38:54,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:38:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:38:54,125 INFO L87 Difference]: Start difference. First operand 516 states and 692 transitions. Second operand 10 states. [2020-10-28 18:38:56,066 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 347 DAG size of output: 343 [2020-10-28 18:38:59,746 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 343 DAG size of output: 339 [2020-10-28 18:39:00,745 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:39:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:02,156 INFO L93 Difference]: Finished difference Result 1568 states and 2239 transitions. [2020-10-28 18:39:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:39:02,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-28 18:39:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:02,167 INFO L225 Difference]: With dead ends: 1568 [2020-10-28 18:39:02,168 INFO L226 Difference]: Without dead ends: 1320 [2020-10-28 18:39:02,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-10-28 18:39:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-10-28 18:39:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 516. [2020-10-28 18:39:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:39:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 691 transitions. [2020-10-28 18:39:02,262 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 691 transitions. Word has length 83 [2020-10-28 18:39:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:02,262 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 691 transitions. [2020-10-28 18:39:02,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:39:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 691 transitions. [2020-10-28 18:39:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:39:02,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:02,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:02,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:39:02,264 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1876465940, now seen corresponding path program 1 times [2020-10-28 18:39:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784877906] [2020-10-28 18:39:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:02,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:03,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:03,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:05,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:06,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 18:39:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:08,266 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:39:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:08,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:08,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:08,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:08,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:39:08,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:08,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:08,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:39:08,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:08,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784877906] [2020-10-28 18:39:08,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:08,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:39:08,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506743674] [2020-10-28 18:39:08,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:39:08,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:39:08,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:39:08,343 INFO L87 Difference]: Start difference. First operand 516 states and 691 transitions. Second operand 10 states. [2020-10-28 18:39:09,292 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:39:11,831 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-28 18:39:12,696 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-28 18:39:15,205 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-28 18:39:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:15,672 INFO L93 Difference]: Finished difference Result 1507 states and 2154 transitions. [2020-10-28 18:39:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 18:39:15,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-28 18:39:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:15,678 INFO L225 Difference]: With dead ends: 1507 [2020-10-28 18:39:15,678 INFO L226 Difference]: Without dead ends: 1501 [2020-10-28 18:39:15,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:39:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-10-28 18:39:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 516. [2020-10-28 18:39:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:39:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 690 transitions. [2020-10-28 18:39:15,780 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 690 transitions. Word has length 83 [2020-10-28 18:39:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:15,780 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 690 transitions. [2020-10-28 18:39:15,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:39:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 690 transitions. [2020-10-28 18:39:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:39:15,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:15,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:15,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:39:15,782 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1470091529, now seen corresponding path program 1 times [2020-10-28 18:39:15,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:15,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476066589] [2020-10-28 18:39:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:15,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:19,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:20,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:20,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:39:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:39:20,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 18:39:20,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:21,827 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:39:21,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:39:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:21,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476066589] [2020-10-28 18:39:21,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:21,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:39:21,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418563811] [2020-10-28 18:39:21,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:39:21,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:21,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:39:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:39:21,895 INFO L87 Difference]: Start difference. First operand 516 states and 690 transitions. Second operand 10 states. [2020-10-28 18:39:22,924 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-28 18:39:25,659 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:39:26,615 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2020-10-28 18:39:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:28,098 INFO L93 Difference]: Finished difference Result 1337 states and 1887 transitions. [2020-10-28 18:39:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:39:28,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-28 18:39:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:28,104 INFO L225 Difference]: With dead ends: 1337 [2020-10-28 18:39:28,104 INFO L226 Difference]: Without dead ends: 1320 [2020-10-28 18:39:28,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-10-28 18:39:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-10-28 18:39:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 516. [2020-10-28 18:39:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:39:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 689 transitions. [2020-10-28 18:39:28,217 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 689 transitions. Word has length 83 [2020-10-28 18:39:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:28,218 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 689 transitions. [2020-10-28 18:39:28,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:39:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 689 transitions. [2020-10-28 18:39:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:39:28,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:28,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:28,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:39:28,219 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1019739614, now seen corresponding path program 1 times [2020-10-28 18:39:28,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:28,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001842822] [2020-10-28 18:39:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:28,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:29,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:29,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:33,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:39:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:34,148 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:39:34,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:34,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:39:34,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:34,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001842822] [2020-10-28 18:39:34,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:34,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:39:34,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231902791] [2020-10-28 18:39:34,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:39:34,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:39:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:39:34,243 INFO L87 Difference]: Start difference. First operand 516 states and 689 transitions. Second operand 6 states. [2020-10-28 18:39:35,155 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-28 18:39:37,090 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-28 18:39:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:37,873 INFO L93 Difference]: Finished difference Result 1094 states and 1530 transitions. [2020-10-28 18:39:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:39:37,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 18:39:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:37,877 INFO L225 Difference]: With dead ends: 1094 [2020-10-28 18:39:37,877 INFO L226 Difference]: Without dead ends: 718 [2020-10-28 18:39:37,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:39:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-28 18:39:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 715. [2020-10-28 18:39:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-10-28 18:39:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1000 transitions. [2020-10-28 18:39:38,023 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1000 transitions. Word has length 84 [2020-10-28 18:39:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:38,023 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1000 transitions. [2020-10-28 18:39:38,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:39:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1000 transitions. [2020-10-28 18:39:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:39:38,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:38,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:38,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:39:38,025 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash -18284376, now seen corresponding path program 1 times [2020-10-28 18:39:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410088324] [2020-10-28 18:39:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:38,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:39,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:43,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:39:43,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 18:39:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:44,011 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-28 18:39:44,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:44,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:39:44,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410088324] [2020-10-28 18:39:44,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:39:44,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:39:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947823037] [2020-10-28 18:39:44,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:39:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:39:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:39:44,063 INFO L87 Difference]: Start difference. First operand 715 states and 1000 transitions. Second operand 9 states. [2020-10-28 18:39:44,955 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-28 18:39:47,467 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-28 18:39:48,392 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-28 18:39:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:49,097 INFO L93 Difference]: Finished difference Result 1446 states and 2080 transitions. [2020-10-28 18:39:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:39:49,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-28 18:39:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:49,103 INFO L225 Difference]: With dead ends: 1446 [2020-10-28 18:39:49,103 INFO L226 Difference]: Without dead ends: 978 [2020-10-28 18:39:49,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:39:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-10-28 18:39:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 704. [2020-10-28 18:39:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-10-28 18:39:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 983 transitions. [2020-10-28 18:39:49,225 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 983 transitions. Word has length 85 [2020-10-28 18:39:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:49,225 INFO L481 AbstractCegarLoop]: Abstraction has 704 states and 983 transitions. [2020-10-28 18:39:49,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:39:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 983 transitions. [2020-10-28 18:39:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:39:49,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:49,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:49,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:39:49,227 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1306415454, now seen corresponding path program 1 times [2020-10-28 18:39:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:49,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657709441] [2020-10-28 18:39:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:49,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:49,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:49,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:50,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:39:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0