/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/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:04:47,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:04:47,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:04:47,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:04:47,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:04:47,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:04:47,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:04:47,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:04:47,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:04:47,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:04:47,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:04:47,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:04:47,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:04:47,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:04:47,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:04:47,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:04:47,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:04:47,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:04:47,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:04:47,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:04:47,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:04:47,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:04:47,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:04:47,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:04:47,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:04:47,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:04:47,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:04:47,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:04:47,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:04:47,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:04:47,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:04:47,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:04:47,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:04:47,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:04:47,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:04:47,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:04:47,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:04:47,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:04:47,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:04:47,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:04:47,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:04:47,463 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 15:04:47,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:04:47,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:04:47,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:04:47,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:04:47,518 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:04:47,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:04:47,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:04:47,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:04:47,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:04:47,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:04:47,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:04:47,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:04:47,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:04:47,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:04:47,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:04:47,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:04:47,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:04:47,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:04:47,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:04:47,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:04:47,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:04:47,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:04:47,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:04:47,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:04:47,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:04:47,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:04:47,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:04:47,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:04:47,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:04:47,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:04:47,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:04:47,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:04:47,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:04:47,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:04:47,977 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:04:47,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2020-10-28 15:04:48,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be8ccdc0b/700f623cac9448baa419737317a46ac2/FLAGbb54d5c81 [2020-10-28 15:04:48,680 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:04:48,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_nondet.i [2020-10-28 15:04:48,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be8ccdc0b/700f623cac9448baa419737317a46ac2/FLAGbb54d5c81 [2020-10-28 15:04:49,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be8ccdc0b/700f623cac9448baa419737317a46ac2 [2020-10-28 15:04:49,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:04:49,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:04:49,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:04:49,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:04:49,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:04:49,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37da46ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49, skipping insertion in model container [2020-10-28 15:04:49,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:04:49,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:04:49,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:04:49,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:04:49,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:04:49,316 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:04:49,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49 WrapperNode [2020-10-28 15:04:49,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:04:49,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:04:49,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:04:49,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:04:49,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (1/1) ... [2020-10-28 15:04:49,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:04:49,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:04:49,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:04:49,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:04:49,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (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 15:04:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:04:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:04:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:04:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:04:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:04:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:04:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:04:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:04:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:04:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:04:49,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:04:49,920 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:04:49,920 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:04:49,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:04:49 BoogieIcfgContainer [2020-10-28 15:04:49,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:04:49,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:04:49,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:04:49,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:04:49,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:04:49" (1/3) ... [2020-10-28 15:04:49,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40644f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:04:49, skipping insertion in model container [2020-10-28 15:04:49,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:49" (2/3) ... [2020-10-28 15:04:49,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40644f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:04:49, skipping insertion in model container [2020-10-28 15:04:49,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:04:49" (3/3) ... [2020-10-28 15:04:49,934 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2020-10-28 15:04:49,947 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:04:49,951 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:04:49,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:04:50,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:04:50,041 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:04:50,041 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:04:50,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:04:50,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:04:50,042 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:04:50,042 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:04:50,042 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:04:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:04:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:04:50,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:50,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:50,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1451065749, now seen corresponding path program 1 times [2020-10-28 15:04:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:50,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505870758] [2020-10-28 15:04:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:50,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:50,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:04:50,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-28 15:04:50,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:50,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:50,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:50,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 15:04:50,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:50,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:50,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:04:50,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:50,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:50,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:50,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:50,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:50,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:50,784 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 15:04:50,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505870758] [2020-10-28 15:04:50,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:04:50,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:04:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236883345] [2020-10-28 15:04:50,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:04:50,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:04:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:04:50,813 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 15:04:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:50,905 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-28 15:04:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:04:50,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:04:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:50,916 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:04:50,916 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:04:50,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:04:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:04:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:04:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:04:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 15:04:50,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 15:04:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:50,975 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 15:04:50,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:04:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 15:04:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:04:50,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:50,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:50,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:04:50,978 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 38839395, now seen corresponding path program 1 times [2020-10-28 15:04:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:50,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016863177] [2020-10-28 15:04:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:04:51,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 15:04:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:04:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:51,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:04:51,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:04:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:51,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:04:51,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,291 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 15:04:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016863177] [2020-10-28 15:04:51,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:04:51,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:04:51,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606724027] [2020-10-28 15:04:51,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:04:51,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:04:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:04:51,295 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-28 15:04:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:51,359 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 15:04:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:04:51,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:04:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:51,360 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:04:51,360 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:04:51,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:04:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:04:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-28 15:04:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:04:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 15:04:51,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-28 15:04:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:51,369 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 15:04:51,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:04:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 15:04:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:04:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:51,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:51,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:04:51,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash -660511009, now seen corresponding path program 1 times [2020-10-28 15:04:51,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:51,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613647195] [2020-10-28 15:04:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:04:51,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:51,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 15:04:51,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:04:51,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:51,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:04:51,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:51,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:51,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:51,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613647195] [2020-10-28 15:04:51,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:51,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:04:51,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939641520] [2020-10-28 15:04:51,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:04:51,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:04:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:04:51,616 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-28 15:04:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:51,720 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-28 15:04:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:04:51,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:04:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:51,722 INFO L225 Difference]: With dead ends: 25 [2020-10-28 15:04:51,722 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:04:51,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:04:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:04:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:04:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:04:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-28 15:04:51,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-28 15:04:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:51,730 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-28 15:04:51,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:04:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-28 15:04:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:04:51,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:51,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:51,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:04:51,732 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1573616219, now seen corresponding path program 2 times [2020-10-28 15:04:51,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:51,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36897480] [2020-10-28 15:04:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:04:51,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 15:04:51,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:04:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:04:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:51,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:51,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:51,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36897480] [2020-10-28 15:04:51,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:51,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:04:51,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404606408] [2020-10-28 15:04:51,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:04:51,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:04:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:04:51,942 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2020-10-28 15:04:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:52,136 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 15:04:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:04:52,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-28 15:04:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:52,137 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:04:52,137 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:04:52,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:04:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:04:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:04:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:04:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-28 15:04:52,144 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-28 15:04:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:52,145 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-28 15:04:52,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:04:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-28 15:04:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:04:52,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:52,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:52,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:04:52,146 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1086234327, now seen corresponding path program 3 times [2020-10-28 15:04:52,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705721721] [2020-10-28 15:04:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:04:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:04:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:52,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:04:52,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705721721] [2020-10-28 15:04:52,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:52,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:04:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022616795] [2020-10-28 15:04:52,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:04:52,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:04:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:04:52,349 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-28 15:04:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:52,578 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 15:04:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:04:52,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-28 15:04:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:52,580 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:04:52,580 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:04:52,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:04:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:04:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-28 15:04:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:04:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-28 15:04:52,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-28 15:04:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:52,587 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-28 15:04:52,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:04:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-28 15:04:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:04:52,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:52,588 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:52,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:04:52,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 863671379, now seen corresponding path program 4 times [2020-10-28 15:04:52,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:52,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584098600] [2020-10-28 15:04:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:04:52,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:52,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 15:04:52,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:04:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:04:52,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:52,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:52,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:52,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:52,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:52,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:52,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:52,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:52,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:52,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584098600] [2020-10-28 15:04:52,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:52,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:04:52,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670621188] [2020-10-28 15:04:52,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:04:52,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:04:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:04:52,814 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 10 states. [2020-10-28 15:04:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:53,076 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 15:04:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:04:53,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-28 15:04:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:53,078 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:04:53,078 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:04:53,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:04:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:04:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 15:04:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:04:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-28 15:04:53,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-28 15:04:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:53,086 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-28 15:04:53,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:04:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-28 15:04:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:04:53,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:53,087 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:53,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:04:53,087 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1729043151, now seen corresponding path program 5 times [2020-10-28 15:04:53,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:53,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047484859] [2020-10-28 15:04:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:53,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:53,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:04:53,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 15:04:53,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:53,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:04:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:04:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:04:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:53,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:53,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:53,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047484859] [2020-10-28 15:04:53,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:53,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:04:53,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46685525] [2020-10-28 15:04:53,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:04:53,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:04:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:04:53,379 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-10-28 15:04:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:53,638 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 15:04:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:04:53,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-28 15:04:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:53,640 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:04:53,640 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:04:53,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:04:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:04:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 15:04:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:04:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-28 15:04:53,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-28 15:04:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:53,646 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-28 15:04:53,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:04:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-28 15:04:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:04:53,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:53,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:53,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:04:53,648 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash 127660619, now seen corresponding path program 6 times [2020-10-28 15:04:53,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:53,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599878789] [2020-10-28 15:04:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:53,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:04:53,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 15:04:53,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:53,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:04:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:04:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:53,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:53,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:53,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:53,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599878789] [2020-10-28 15:04:53,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:53,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:04:53,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436928449] [2020-10-28 15:04:53,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:04:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:04:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:04:53,965 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-10-28 15:04:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:54,317 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 15:04:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:04:54,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-28 15:04:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:54,318 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:04:54,319 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:04:54,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:04:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:04:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 15:04:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:04:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 15:04:54,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-28 15:04:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:54,326 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 15:04:54,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:04:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 15:04:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:04:54,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:54,327 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:54,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:04:54,328 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1202660665, now seen corresponding path program 7 times [2020-10-28 15:04:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:54,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163940085] [2020-10-28 15:04:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:54,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:54,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:04:54,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:54,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-28 15:04:54,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:54,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:04:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:04:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:04:54,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:54,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:54,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:54,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:54,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:54,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163940085] [2020-10-28 15:04:54,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:54,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:04:54,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438372255] [2020-10-28 15:04:54,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:04:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:04:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:04:54,745 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2020-10-28 15:04:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:55,120 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 15:04:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:04:55,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-28 15:04:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:55,122 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:04:55,123 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:04:55,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:04:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:04:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 15:04:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:04:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-28 15:04:55,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-28 15:04:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:55,138 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-28 15:04:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:04:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-28 15:04:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:04:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:55,141 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:55,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:04:55,142 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 258839619, now seen corresponding path program 8 times [2020-10-28 15:04:55,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:55,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643826793] [2020-10-28 15:04:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:55,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:55,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:55,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:04:55,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:04:55,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:55,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:55,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:55,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:55,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:55,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:55,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:55,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:55,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643826793] [2020-10-28 15:04:55,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:55,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:04:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674784499] [2020-10-28 15:04:55,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:04:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:04:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:04:55,585 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2020-10-28 15:04:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:55,937 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-28 15:04:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:04:55,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-28 15:04:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:55,939 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:04:55,940 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:04:55,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:04:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:04:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 15:04:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:04:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-28 15:04:55,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-28 15:04:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:55,947 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-28 15:04:55,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:04:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-28 15:04:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:04:55,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:55,948 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:55,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:04:55,949 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash 306306751, now seen corresponding path program 9 times [2020-10-28 15:04:55,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:55,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76128972] [2020-10-28 15:04:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:56,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:56,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:04:56,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:56,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-28 15:04:56,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:56,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:04:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:04:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:56,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:56,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:04:56,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:56,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:56,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76128972] [2020-10-28 15:04:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:04:56,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244135837] [2020-10-28 15:04:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:04:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:04:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:04:56,390 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-10-28 15:04:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:56,859 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-28 15:04:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:04:56,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-28 15:04:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:56,861 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:04:56,861 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:04:56,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:04:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:04:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 15:04:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:04:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-28 15:04:56,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-28 15:04:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:56,870 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-28 15:04:56,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:04:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-28 15:04:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:04:56,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:56,872 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:56,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:04:56,872 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1322419653, now seen corresponding path program 10 times [2020-10-28 15:04:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:56,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120304533] [2020-10-28 15:04:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:56,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:04:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:04:57,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:57,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:57,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:57,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:57,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:57,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:57,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:57,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:57,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120304533] [2020-10-28 15:04:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:04:57,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436586134] [2020-10-28 15:04:57,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:04:57,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:04:57,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:04:57,349 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 16 states. [2020-10-28 15:04:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:57,825 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-28 15:04:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:04:57,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-28 15:04:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:57,826 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:04:57,827 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:04:57,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:04:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:04:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 15:04:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:04:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-28 15:04:57,836 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-28 15:04:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:57,836 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-28 15:04:57,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:04:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-28 15:04:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:04:57,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:57,838 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:57,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:04:57,838 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1134569143, now seen corresponding path program 11 times [2020-10-28 15:04:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:57,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167216270] [2020-10-28 15:04:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:58,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:04:58,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-28 15:04:58,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:58,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:04:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:04:58,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:58,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:58,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:58,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167216270] [2020-10-28 15:04:58,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:58,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:04:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190970318] [2020-10-28 15:04:58,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:04:58,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:04:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:04:58,471 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 17 states. [2020-10-28 15:04:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:58,951 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-28 15:04:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:04:58,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-28 15:04:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:58,952 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:04:58,952 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:04:58,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:04:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:04:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 15:04:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:04:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-28 15:04:58,960 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-28 15:04:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:58,960 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-28 15:04:58,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:04:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-28 15:04:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:04:58,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:58,961 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:58,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:04:58,977 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:58,977 INFO L82 PathProgramCache]: Analyzing trace with hash 68789299, now seen corresponding path program 12 times [2020-10-28 15:04:58,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:58,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258139982] [2020-10-28 15:04:58,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:59,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:59,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:04:59,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-28 15:04:59,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:59,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:04:59,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:04:59,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:04:59,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:59,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:59,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:59,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:59,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:59,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258139982] [2020-10-28 15:04:59,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:59,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:04:59,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224403053] [2020-10-28 15:04:59,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:04:59,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:04:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:04:59,709 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 18 states. [2020-10-28 15:05:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:00,269 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-28 15:05:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:05:00,270 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-28 15:05:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:00,271 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:05:00,271 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:05:00,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:05:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:05:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 15:05:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:05:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-28 15:05:00,279 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-28 15:05:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:00,279 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-28 15:05:00,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:05:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-28 15:05:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:05:00,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:00,280 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:00,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:05:00,280 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1943424337, now seen corresponding path program 13 times [2020-10-28 15:05:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:00,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252522746] [2020-10-28 15:05:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:00,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:00,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:00,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:05:00,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:00,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-28 15:05:00,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:00,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:00,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:05:00,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:00,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:05:00,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:00,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:00,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:00,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:00,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:00,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:00,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252522746] [2020-10-28 15:05:00,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:00,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:05:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414319038] [2020-10-28 15:05:00,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:05:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:05:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:05:00,956 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 19 states. [2020-10-28 15:05:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:01,538 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-28 15:05:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:05:01,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-10-28 15:05:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:01,539 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:05:01,540 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:05:01,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=816, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:05:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:05:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 15:05:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:05:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-28 15:05:01,559 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-28 15:05:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:01,559 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-28 15:05:01,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:05:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-28 15:05:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:05:01,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:01,560 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:01,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:05:01,561 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1349521963, now seen corresponding path program 14 times [2020-10-28 15:05:01,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:01,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397969625] [2020-10-28 15:05:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:01,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:02,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:05:02,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:05:02,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:02,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:02,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:02,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:02,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:02,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:02,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:02,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397969625] [2020-10-28 15:05:02,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:02,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:05:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705279734] [2020-10-28 15:05:02,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:05:02,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:02,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:05:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:05:02,249 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 20 states. [2020-10-28 15:05:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:02,878 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-28 15:05:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:05:02,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-28 15:05:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:02,880 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:05:02,880 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:05:02,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:05:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:05:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 15:05:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:05:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-28 15:05:02,895 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-28 15:05:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:02,895 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-28 15:05:02,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:05:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-28 15:05:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:05:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:02,896 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:02,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:05:02,896 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 480019111, now seen corresponding path program 15 times [2020-10-28 15:05:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841673147] [2020-10-28 15:05:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:03,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:03,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:05:03,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:03,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:05:03,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:03,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:03,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:03,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841673147] [2020-10-28 15:05:03,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:03,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:05:03,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077691909] [2020-10-28 15:05:03,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:05:03,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:05:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:05:03,649 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 21 states. [2020-10-28 15:05:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:04,326 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-28 15:05:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:05:04,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-28 15:05:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:04,329 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:05:04,329 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:05:04,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:05:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:05:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 15:05:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:05:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-28 15:05:04,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-28 15:05:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:04,341 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-28 15:05:04,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:05:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-28 15:05:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:05:04,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:04,346 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:04,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:05:04,346 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1888566237, now seen corresponding path program 16 times [2020-10-28 15:05:04,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:04,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903002570] [2020-10-28 15:05:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:04,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:04,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:05:04,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:05:04,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:05,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:05,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:05,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:05,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:05,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:05,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903002570] [2020-10-28 15:05:05,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:05,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:05:05,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639481423] [2020-10-28 15:05:05,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:05:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:05:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:05:05,205 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 22 states. [2020-10-28 15:05:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:05,972 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-28 15:05:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:05:05,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-28 15:05:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:05,974 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:05:05,974 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:05:05,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=1113, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:05:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:05:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 15:05:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:05:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-28 15:05:05,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-28 15:05:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:05,991 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-28 15:05:05,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:05:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-28 15:05:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:05:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:05,994 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:05,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:05:05,994 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1766418785, now seen corresponding path program 17 times [2020-10-28 15:05:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:05,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091136030] [2020-10-28 15:05:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:06,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:06,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:05:06,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:06,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:05:06,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:06,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:06,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:06,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:06,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:06,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:06,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:06,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:06,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:06,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:06,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091136030] [2020-10-28 15:05:06,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:06,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:05:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223794563] [2020-10-28 15:05:06,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:05:06,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:05:06,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:05:06,939 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 23 states. [2020-10-28 15:05:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:07,756 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-28 15:05:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:05:07,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-28 15:05:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:07,757 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:05:07,758 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:05:07,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:05:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:05:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 15:05:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:05:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-28 15:05:07,765 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-28 15:05:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:07,766 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-28 15:05:07,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:05:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-28 15:05:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:05:07,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:07,766 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:07,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:05:07,767 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash -346834405, now seen corresponding path program 18 times [2020-10-28 15:05:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:07,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985792283] [2020-10-28 15:05:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:07,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:08,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:08,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:08,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:05:08,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:08,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:08,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:08,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:08,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:08,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:08,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985792283] [2020-10-28 15:05:08,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:08,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:05:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097817417] [2020-10-28 15:05:08,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:05:08,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:05:08,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:05:08,776 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 24 states. [2020-10-28 15:05:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:09,558 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-28 15:05:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:05:09,559 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-28 15:05:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:09,560 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:05:09,560 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:05:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:05:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:05:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 15:05:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:05:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-28 15:05:09,568 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-28 15:05:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:09,568 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-28 15:05:09,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:05:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-28 15:05:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:05:09,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:09,569 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:09,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:05:09,569 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1925845353, now seen corresponding path program 19 times [2020-10-28 15:05:09,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:09,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924134017] [2020-10-28 15:05:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:09,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:05:10,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:10,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:05:10,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:10,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:10,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:10,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924134017] [2020-10-28 15:05:10,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:10,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:05:10,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686057085] [2020-10-28 15:05:10,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:05:10,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:05:10,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:05:10,633 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 25 states. [2020-10-28 15:05:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:11,587 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-28 15:05:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:05:11,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-28 15:05:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:11,589 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:05:11,589 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:05:11,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:05:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:05:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 15:05:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:05:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-28 15:05:11,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-28 15:05:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:11,596 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-28 15:05:11,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:05:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-28 15:05:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:05:11,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:11,597 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:11,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:05:11,597 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1063056403, now seen corresponding path program 20 times [2020-10-28 15:05:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:11,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485706144] [2020-10-28 15:05:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:12,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:05:12,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:12,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-28 15:05:12,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:12,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:05:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:05:12,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:12,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:12,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:12,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:12,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:12,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:12,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485706144] [2020-10-28 15:05:12,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:12,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:05:12,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763384328] [2020-10-28 15:05:12,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:05:12,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:12,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:05:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:05:12,920 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 26 states. [2020-10-28 15:05:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:13,983 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-28 15:05:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:05:13,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-28 15:05:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:13,984 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:05:13,984 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:05:13,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=773, Invalid=1579, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:05:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:05:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 15:05:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:05:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-28 15:05:13,993 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-28 15:05:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-28 15:05:13,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:05:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-28 15:05:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:05:13,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:13,994 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:13,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:05:13,995 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 64522895, now seen corresponding path program 21 times [2020-10-28 15:05:13,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:13,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345982333] [2020-10-28 15:05:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:14,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:05:14,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:05:14,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:15,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:15,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:15,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345982333] [2020-10-28 15:05:15,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:15,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:05:15,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826110558] [2020-10-28 15:05:15,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:05:15,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:05:15,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:05:15,261 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 27 states. [2020-10-28 15:05:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:16,260 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-28 15:05:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:05:16,261 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-10-28 15:05:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:16,262 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:05:16,262 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:05:16,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=842, Invalid=1708, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:05:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:05:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-28 15:05:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:05:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-28 15:05:16,270 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-28 15:05:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:16,270 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-28 15:05:16,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:05:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-28 15:05:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:05:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:16,271 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:16,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:05:16,271 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1748471285, now seen corresponding path program 22 times [2020-10-28 15:05:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:16,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351874849] [2020-10-28 15:05:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:17,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:05:17,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:17,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-28 15:05:17,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:17,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:05:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:05:17,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:17,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:17,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351874849] [2020-10-28 15:05:17,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:17,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:05:17,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191255986] [2020-10-28 15:05:17,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:05:17,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:05:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:05:17,579 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 28 states. [2020-10-28 15:05:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:18,666 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-28 15:05:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:05:18,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-28 15:05:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:18,667 INFO L225 Difference]: With dead ends: 68 [2020-10-28 15:05:18,667 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:05:18,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=914, Invalid=1842, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:05:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:05:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-28 15:05:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 15:05:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-28 15:05:18,675 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-28 15:05:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:18,675 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-28 15:05:18,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:05:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-28 15:05:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:05:18,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:18,676 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:18,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:05:18,677 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -279156089, now seen corresponding path program 23 times [2020-10-28 15:05:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:18,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121461492] [2020-10-28 15:05:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:18,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:19,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:19,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:05:19,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-28 15:05:19,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:19,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:05:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 15:05:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:20,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:20,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121461492] [2020-10-28 15:05:20,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:20,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:05:20,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250521447] [2020-10-28 15:05:20,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:05:20,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:05:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:05:20,173 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 29 states. [2020-10-28 15:05:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:21,280 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-28 15:05:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:05:21,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-10-28 15:05:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:21,281 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:05:21,282 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:05:21,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=989, Invalid=1981, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:05:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:05:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 15:05:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:05:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-28 15:05:21,291 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-28 15:05:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:21,291 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-28 15:05:21,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:05:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-28 15:05:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 15:05:21,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:21,294 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:21,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:05:21,294 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1311493117, now seen corresponding path program 24 times [2020-10-28 15:05:21,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:21,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164531840] [2020-10-28 15:05:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:21,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:22,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:05:22,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:22,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:22,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:22,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:22,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:22,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:22,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164531840] [2020-10-28 15:05:22,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:22,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:05:22,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898355123] [2020-10-28 15:05:22,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:05:22,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:05:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:05:22,903 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 30 states. [2020-10-28 15:05:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:24,137 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-28 15:05:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:05:24,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-10-28 15:05:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:24,140 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:05:24,141 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:05:24,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2125, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:05:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:05:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 15:05:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 15:05:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-28 15:05:24,147 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-28 15:05:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:24,147 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-28 15:05:24,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:05:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-28 15:05:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 15:05:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:24,148 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:24,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:05:24,148 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1249931649, now seen corresponding path program 25 times [2020-10-28 15:05:24,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:24,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202830856] [2020-10-28 15:05:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:24,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:25,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:25,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 15:05:25,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:25,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:05:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:25,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:25,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:25,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:25,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:25,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202830856] [2020-10-28 15:05:25,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:05:25,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014730226] [2020-10-28 15:05:25,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:05:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:05:25,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:05:25,669 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 31 states. [2020-10-28 15:05:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:26,877 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-28 15:05:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:05:26,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2020-10-28 15:05:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:26,879 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:05:26,879 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:05:26,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1148, Invalid=2274, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:05:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:05:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 15:05:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 15:05:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-28 15:05:26,885 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-28 15:05:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:26,886 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-28 15:05:26,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:05:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-28 15:05:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 15:05:26,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:26,887 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:26,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:05:26,887 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2076064251, now seen corresponding path program 26 times [2020-10-28 15:05:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:26,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082019925] [2020-10-28 15:05:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:26,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:27,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:27,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:05:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:28,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:28,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:28,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:28,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:28,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:28,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082019925] [2020-10-28 15:05:28,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:28,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:05:28,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508088496] [2020-10-28 15:05:28,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:05:28,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:28,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:05:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:05:28,479 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 32 states. [2020-10-28 15:05:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:29,890 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-28 15:05:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:05:29,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-10-28 15:05:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:29,892 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:05:29,892 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:05:29,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1232, Invalid=2428, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:05:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:05:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-28 15:05:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 15:05:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-28 15:05:29,900 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-28 15:05:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:29,901 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-28 15:05:29,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:05:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-28 15:05:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 15:05:29,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:29,901 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:29,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:05:29,902 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1392511369, now seen corresponding path program 27 times [2020-10-28 15:05:29,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:29,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839027977] [2020-10-28 15:05:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:30,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:30,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 15:05:30,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:30,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-28 15:05:30,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:30,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:05:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 15:05:30,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:31,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:31,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:31,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:31,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:31,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839027977] [2020-10-28 15:05:31,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:31,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:05:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854823929] [2020-10-28 15:05:31,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:05:31,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:05:31,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:05:31,446 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 33 states. [2020-10-28 15:05:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:32,900 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-28 15:05:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:05:32,900 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-10-28 15:05:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:32,902 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:05:32,902 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 15:05:32,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1319, Invalid=2587, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:05:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 15:05:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 15:05:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:05:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-28 15:05:32,910 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-28 15:05:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:32,910 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-28 15:05:32,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:05:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-28 15:05:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:05:32,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:32,911 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:32,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:05:32,911 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1799060493, now seen corresponding path program 28 times [2020-10-28 15:05:32,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:32,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986085420] [2020-10-28 15:05:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:32,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:34,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 15:05:34,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:34,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:34,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:34,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:34,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986085420] [2020-10-28 15:05:34,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:34,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:05:34,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713074722] [2020-10-28 15:05:34,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:05:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:05:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:05:34,674 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 34 states. [2020-10-28 15:05:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:36,259 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-28 15:05:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:05:36,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 69 [2020-10-28 15:05:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:36,261 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:05:36,261 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:05:36,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:05:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:05:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 15:05:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 15:05:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-28 15:05:36,269 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-28 15:05:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:36,269 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-28 15:05:36,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:05:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-28 15:05:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 15:05:36,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:36,270 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:36,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:05:36,270 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1650744721, now seen corresponding path program 29 times [2020-10-28 15:05:36,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:36,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699275904] [2020-10-28 15:05:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:37,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 15:05:37,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:05:37,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:37,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:37,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:37,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:37,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699275904] [2020-10-28 15:05:37,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:37,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:05:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722026857] [2020-10-28 15:05:37,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:05:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:05:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:05:37,892 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 35 states. [2020-10-28 15:05:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:39,502 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-28 15:05:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:05:39,503 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 71 [2020-10-28 15:05:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:39,504 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:05:39,504 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:05:39,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1502, Invalid=2920, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:05:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:05:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 15:05:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 15:05:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-28 15:05:39,510 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-28 15:05:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:39,510 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-28 15:05:39,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:05:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-28 15:05:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 15:05:39,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:39,511 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:39,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:05:39,511 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash -853208597, now seen corresponding path program 30 times [2020-10-28 15:05:39,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:39,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874004600] [2020-10-28 15:05:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:05:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 15:05:40,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:41,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:41,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:41,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:41,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874004600] [2020-10-28 15:05:41,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:41,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:05:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811477978] [2020-10-28 15:05:41,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:05:41,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:41,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:05:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:05:41,377 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 36 states. [2020-10-28 15:05:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:43,014 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-28 15:05:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:05:43,015 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2020-10-28 15:05:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:43,016 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:05:43,016 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:05:43,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1598, Invalid=3094, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:05:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:05:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 15:05:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 15:05:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-28 15:05:43,023 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-28 15:05:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:43,024 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-28 15:05:43,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:05:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-28 15:05:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 15:05:43,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:43,024 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:43,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:05:43,024 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1074827879, now seen corresponding path program 31 times [2020-10-28 15:05:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:43,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869991150] [2020-10-28 15:05:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:44,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 15:05:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 15:05:44,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:44,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:44,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:44,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:44,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:44,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:44,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869991150] [2020-10-28 15:05:44,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:44,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 15:05:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374635101] [2020-10-28 15:05:44,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 15:05:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 15:05:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:05:44,836 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 37 states. [2020-10-28 15:05:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:46,574 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-28 15:05:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 15:05:46,575 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 75 [2020-10-28 15:05:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:46,576 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:05:46,576 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:05:46,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1697, Invalid=3273, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 15:05:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:05:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 15:05:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 15:05:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-28 15:05:46,585 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-28 15:05:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:46,585 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-28 15:05:46,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 15:05:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-28 15:05:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 15:05:46,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:46,586 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:46,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:05:46,586 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1507990557, now seen corresponding path program 32 times [2020-10-28 15:05:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:46,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626501183] [2020-10-28 15:05:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:46,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 15:05:47,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:48,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626501183] [2020-10-28 15:05:48,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:48,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 15:05:48,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71227353] [2020-10-28 15:05:48,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 15:05:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 15:05:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:05:48,502 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 38 states. [2020-10-28 15:05:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:50,316 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-28 15:05:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 15:05:50,317 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-10-28 15:05:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:50,318 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:05:50,318 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:05:50,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1799, Invalid=3457, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 15:05:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:05:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 15:05:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 15:05:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-28 15:05:50,327 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-28 15:05:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:50,327 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-28 15:05:50,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 15:05:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-28 15:05:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 15:05:50,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:50,328 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:50,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:05:50,329 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1105410465, now seen corresponding path program 33 times [2020-10-28 15:05:50,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:50,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867290262] [2020-10-28 15:05:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:50,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:51,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 15:05:51,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:51,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 15:05:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:52,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:52,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:52,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:52,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867290262] [2020-10-28 15:05:52,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:52,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 15:05:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962858786] [2020-10-28 15:05:52,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 15:05:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:52,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 15:05:52,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:05:52,523 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 39 states. [2020-10-28 15:05:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:54,335 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-28 15:05:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 15:05:54,336 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 79 [2020-10-28 15:05:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:54,337 INFO L225 Difference]: With dead ends: 90 [2020-10-28 15:05:54,337 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:05:54,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1904, Invalid=3646, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 15:05:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:05:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 15:05:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 15:05:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-28 15:05:54,344 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-28 15:05:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:54,345 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-28 15:05:54,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 15:05:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-28 15:05:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 15:05:54,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:54,346 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:54,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:05:54,346 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash -772998693, now seen corresponding path program 34 times [2020-10-28 15:05:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:54,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658123183] [2020-10-28 15:05:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1564 [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:05:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 15:05:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:56,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:56,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658123183] [2020-10-28 15:05:56,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:05:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988296276] [2020-10-28 15:05:56,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:05:56,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:05:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:05:56,771 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 40 states. [2020-10-28 15:05:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:58,777 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-28 15:05:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:05:58,777 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2020-10-28 15:05:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:58,778 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:05:58,779 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:05:58,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2012, Invalid=3840, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:05:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:05:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 15:05:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 15:05:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-28 15:05:58,785 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-28 15:05:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:58,785 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-28 15:05:58,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:05:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-28 15:05:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 15:05:58,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:58,786 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:58,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:05:58,786 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 847134295, now seen corresponding path program 35 times [2020-10-28 15:05:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:58,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867761780] [2020-10-28 15:05:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 15:06:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:01,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867761780] [2020-10-28 15:06:01,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:01,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 15:06:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019456158] [2020-10-28 15:06:01,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 15:06:01,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 15:06:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:06:01,196 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 41 states. [2020-10-28 15:06:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:03,187 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-28 15:06:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 15:06:03,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 83 [2020-10-28 15:06:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:03,189 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:06:03,189 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:06:03,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2123, Invalid=4039, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 15:06:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:06:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 15:06:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 15:06:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-28 15:06:03,197 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-28 15:06:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:03,197 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-28 15:06:03,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 15:06:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-28 15:06:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 15:06:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:03,198 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:03,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:06:03,199 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1278192685, now seen corresponding path program 36 times [2020-10-28 15:06:03,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:03,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793898560] [2020-10-28 15:06:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 15:06:04,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:04,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-28 15:06:04,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 15:06:04,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:04,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 15:06:04,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:05,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:05,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793898560] [2020-10-28 15:06:05,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:05,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 15:06:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596806339] [2020-10-28 15:06:05,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 15:06:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 15:06:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:06:05,641 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 42 states. [2020-10-28 15:06:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:07,778 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-28 15:06:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 15:06:07,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 85 [2020-10-28 15:06:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:07,780 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:06:07,780 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:06:07,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2237, Invalid=4243, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 15:06:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:06:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 15:06:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 15:06:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-28 15:06:07,789 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-28 15:06:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:07,789 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-28 15:06:07,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 15:06:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-28 15:06:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 15:06:07,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:07,790 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:07,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:06:07,790 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 687012431, now seen corresponding path program 37 times [2020-10-28 15:06:07,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:07,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907994912] [2020-10-28 15:06:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:07,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1603 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:09,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 15:06:09,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:10,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:10,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:10,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907994912] [2020-10-28 15:06:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:10,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 15:06:10,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123896453] [2020-10-28 15:06:10,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 15:06:10,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 15:06:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:06:10,366 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 43 states. [2020-10-28 15:06:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:12,694 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-28 15:06:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 15:06:12,695 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 87 [2020-10-28 15:06:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:12,696 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:06:12,696 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:06:12,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2354, Invalid=4452, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 15:06:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:06:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 15:06:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 15:06:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-28 15:06:12,704 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-28 15:06:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:12,705 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-28 15:06:12,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 15:06:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-28 15:06:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 15:06:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:12,706 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:12,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:06:12,706 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -536481333, now seen corresponding path program 38 times [2020-10-28 15:06:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:12,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931570054] [2020-10-28 15:06:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:14,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:14,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 15:06:14,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:14,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 15:06:14,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:15,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:15,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:15,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931570054] [2020-10-28 15:06:15,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:15,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 15:06:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675300093] [2020-10-28 15:06:15,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 15:06:15,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 15:06:15,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:06:15,485 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 44 states. [2020-10-28 15:06:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:17,853 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-28 15:06:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 15:06:17,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 89 [2020-10-28 15:06:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:17,855 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:06:17,855 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 15:06:17,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2474, Invalid=4666, Unknown=0, NotChecked=0, Total=7140 [2020-10-28 15:06:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 15:06:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 15:06:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 15:06:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-28 15:06:17,863 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-28 15:06:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:17,864 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-28 15:06:17,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 15:06:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-28 15:06:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 15:06:17,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:17,865 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:17,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:06:17,865 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash 507050567, now seen corresponding path program 39 times [2020-10-28 15:06:17,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:17,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952030458] [2020-10-28 15:06:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 15:06:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:20,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:20,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:20,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952030458] [2020-10-28 15:06:20,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:20,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 15:06:20,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048223139] [2020-10-28 15:06:20,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 15:06:20,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 15:06:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:06:20,868 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 45 states. [2020-10-28 15:06:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,383 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-28 15:06:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 15:06:23,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2020-10-28 15:06:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,385 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:06:23,385 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 15:06:23,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2597, Invalid=4885, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 15:06:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 15:06:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-28 15:06:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 15:06:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-28 15:06:23,394 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-28 15:06:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,394 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-28 15:06:23,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 15:06:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-28 15:06:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 15:06:23,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,395 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:06:23,396 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1681140797, now seen corresponding path program 40 times [2020-10-28 15:06:23,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835254525] [2020-10-28 15:06:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 15:06:25,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:25,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-28 15:06:25,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 15:06:25,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:25,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 15:06:25,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:06:26,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:26,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:26,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835254525] [2020-10-28 15:06:26,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:26,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 15:06:26,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893030669] [2020-10-28 15:06:26,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 15:06:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 15:06:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 15:06:26,408 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 46 states. [2020-10-28 15:06:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:28,875 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-28 15:06:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 15:06:28,875 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 93 [2020-10-28 15:06:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:28,877 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:06:28,877 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:06:28,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2723, Invalid=5109, Unknown=0, NotChecked=0, Total=7832 [2020-10-28 15:06:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:06:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 15:06:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 15:06:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-28 15:06:28,885 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-28 15:06:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:28,886 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-28 15:06:28,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 15:06:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-28 15:06:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 15:06:28,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:28,887 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:28,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:06:28,887 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:28,888 INFO L82 PathProgramCache]: Analyzing trace with hash 933439, now seen corresponding path program 41 times [2020-10-28 15:06:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960465062] [2020-10-28 15:06:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:28,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2021 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 15:06:30,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:30,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-28 15:06:30,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:32,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:32,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960465062] [2020-10-28 15:06:32,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:32,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 15:06:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498241006] [2020-10-28 15:06:32,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 15:06:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 15:06:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:06:32,136 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 47 states. [2020-10-28 15:06:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:34,697 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-28 15:06:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 15:06:34,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 95 [2020-10-28 15:06:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:34,699 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:06:34,699 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:06:34,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2852, Invalid=5338, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 15:06:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:06:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 15:06:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 15:06:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-28 15:06:34,711 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-28 15:06:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:34,713 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-28 15:06:34,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 15:06:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-28 15:06:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 15:06:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:34,715 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:34,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:06:34,715 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1566570939, now seen corresponding path program 42 times [2020-10-28 15:06:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635640966] [2020-10-28 15:06:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2342 [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:37,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 15:06:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 15:06:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:38,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:38,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635640966] [2020-10-28 15:06:38,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:38,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 15:06:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323609259] [2020-10-28 15:06:38,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 15:06:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 15:06:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 15:06:38,333 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 48 states. [2020-10-28 15:06:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:41,072 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-28 15:06:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 15:06:41,072 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 97 [2020-10-28 15:06:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:41,074 INFO L225 Difference]: With dead ends: 108 [2020-10-28 15:06:41,074 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 15:06:41,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2984, Invalid=5572, Unknown=0, NotChecked=0, Total=8556 [2020-10-28 15:06:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 15:06:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 15:06:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:06:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-28 15:06:41,083 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-28 15:06:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:41,093 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-28 15:06:41,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 15:06:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-28 15:06:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 15:06:41,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:41,094 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:06:41,094 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1389312457, now seen corresponding path program 43 times [2020-10-28 15:06:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119189247] [2020-10-28 15:06:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:43,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2245 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 15:06:43,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:44,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:44,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:44,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119189247] [2020-10-28 15:06:44,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:44,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 15:06:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420823877] [2020-10-28 15:06:44,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 15:06:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 15:06:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:06:44,664 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 49 states. [2020-10-28 15:06:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:47,474 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-28 15:06:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 15:06:47,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 99 [2020-10-28 15:06:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:47,476 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:06:47,476 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:06:47,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3119, Invalid=5811, Unknown=0, NotChecked=0, Total=8930 [2020-10-28 15:06:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:06:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 15:06:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 15:06:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-28 15:06:47,485 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-28 15:06:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:47,485 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-28 15:06:47,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 15:06:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-28 15:06:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 15:06:47,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:47,486 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:47,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:06:47,486 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1275093939, now seen corresponding path program 44 times [2020-10-28 15:06:47,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:47,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251700926] [2020-10-28 15:06:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2848 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 15:06:50,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:51,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:51,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:51,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:51,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251700926] [2020-10-28 15:06:51,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:51,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 15:06:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030151479] [2020-10-28 15:06:51,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 15:06:51,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 15:06:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 15:06:51,704 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 50 states. [2020-10-28 15:06:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:54,772 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-28 15:06:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 15:06:54,773 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 101 [2020-10-28 15:06:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:54,774 INFO L225 Difference]: With dead ends: 112 [2020-10-28 15:06:54,774 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:06:54,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3257, Invalid=6055, Unknown=0, NotChecked=0, Total=9312 [2020-10-28 15:06:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:06:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-28 15:06:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 15:06:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-28 15:06:54,783 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-28 15:06:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:54,783 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-28 15:06:54,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 15:06:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-28 15:06:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 15:06:54,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:54,784 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:54,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:06:54,784 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1969132079, now seen corresponding path program 45 times [2020-10-28 15:06:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:54,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036297096] [2020-10-28 15:06:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2552 [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 15:06:57,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:57,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-28 15:06:57,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:58,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:58,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:58,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:58,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:58,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:58,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:58,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:58,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:58,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036297096] [2020-10-28 15:06:58,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:58,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 15:06:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917751742] [2020-10-28 15:06:58,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 15:06:58,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 15:06:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:06:58,873 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 51 states. [2020-10-28 15:07:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:01,985 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-28 15:07:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 15:07:01,986 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 103 [2020-10-28 15:07:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:01,987 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:07:01,988 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 15:07:01,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3398, Invalid=6304, Unknown=0, NotChecked=0, Total=9702 [2020-10-28 15:07:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 15:07:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 15:07:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 15:07:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-28 15:07:01,997 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-28 15:07:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:01,997 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-28 15:07:01,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 15:07:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-28 15:07:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 15:07:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:01,998 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:01,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:07:01,999 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1075113557, now seen corresponding path program 46 times [2020-10-28 15:07:01,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:02,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235357079] [2020-10-28 15:07:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:02,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:04,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:04,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 15:07:04,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2821 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-28 15:07:04,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:06,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:06,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235357079] [2020-10-28 15:07:06,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:06,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 15:07:06,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572060286] [2020-10-28 15:07:06,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 15:07:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 15:07:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 15:07:06,325 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 52 states. [2020-10-28 15:07:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:09,557 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-28 15:07:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 15:07:09,558 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 105 [2020-10-28 15:07:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:09,560 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:07:09,560 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:07:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3542, Invalid=6558, Unknown=0, NotChecked=0, Total=10100 [2020-10-28 15:07:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:07:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 15:07:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 15:07:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-28 15:07:09,570 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-28 15:07:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:09,570 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-28 15:07:09,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 15:07:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-28 15:07:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 15:07:09,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:09,571 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:09,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:07:09,571 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1722441177, now seen corresponding path program 47 times [2020-10-28 15:07:09,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:09,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727859393] [2020-10-28 15:07:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 15:07:12,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:12,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3193 [2020-10-28 15:07:12,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 15:07:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 15:07:12,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727859393] [2020-10-28 15:07:14,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:14,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 15:07:14,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448487234] [2020-10-28 15:07:14,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 15:07:14,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 15:07:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:07:14,365 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 53 states. [2020-10-28 15:07:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:17,836 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-28 15:07:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 15:07:17,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 107 [2020-10-28 15:07:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:17,838 INFO L225 Difference]: With dead ends: 118 [2020-10-28 15:07:17,838 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 15:07:17,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3689, Invalid=6817, Unknown=0, NotChecked=0, Total=10506 [2020-10-28 15:07:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 15:07:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 15:07:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 15:07:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-28 15:07:17,848 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-28 15:07:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:17,848 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-28 15:07:17,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 15:07:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-28 15:07:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 15:07:17,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:17,849 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:17,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:07:17,849 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1034026077, now seen corresponding path program 48 times [2020-10-28 15:07:17,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:17,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958667899] [2020-10-28 15:07:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3329 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 15:07:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:22,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:22,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:22,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958667899] [2020-10-28 15:07:22,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:22,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 15:07:22,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726556090] [2020-10-28 15:07:22,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 15:07:22,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 15:07:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 15:07:22,977 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 54 states. [2020-10-28 15:07:26,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:26,605 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-28 15:07:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 15:07:26,606 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 109 [2020-10-28 15:07:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:26,608 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:07:26,608 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:07:26,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3839, Invalid=7081, Unknown=0, NotChecked=0, Total=10920 [2020-10-28 15:07:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:07:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 15:07:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:07:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-28 15:07:26,617 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-28 15:07:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:26,618 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-28 15:07:26,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 15:07:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-28 15:07:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:07:26,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:26,619 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:26,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:07:26,619 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash -892078561, now seen corresponding path program 49 times [2020-10-28 15:07:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:26,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382439324] [2020-10-28 15:07:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:29,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3258 [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 15:07:29,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:29,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 15:07:29,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:31,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:31,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:31,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:31,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:31,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:31,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382439324] [2020-10-28 15:07:31,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:31,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 15:07:31,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111395018] [2020-10-28 15:07:31,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 15:07:31,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 15:07:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:07:31,716 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 55 states. [2020-10-28 15:07:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:35,474 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-28 15:07:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 15:07:35,475 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 111 [2020-10-28 15:07:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:35,477 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:07:35,477 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 15:07:35,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3992, Invalid=7350, Unknown=0, NotChecked=0, Total=11342 [2020-10-28 15:07:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 15:07:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 15:07:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:07:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-28 15:07:35,496 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-28 15:07:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:35,497 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-28 15:07:35,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 15:07:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-28 15:07:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 15:07:35,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:35,500 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:35,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:07:35,500 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1919469157, now seen corresponding path program 50 times [2020-10-28 15:07:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715356311] [2020-10-28 15:07:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3289 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 15:07:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:40,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:40,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715356311] [2020-10-28 15:07:40,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:40,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 15:07:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358026801] [2020-10-28 15:07:40,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 15:07:40,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 15:07:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 15:07:40,718 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 56 states. [2020-10-28 15:07:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:44,563 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-28 15:07:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 15:07:44,564 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 113 [2020-10-28 15:07:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:44,565 INFO L225 Difference]: With dead ends: 124 [2020-10-28 15:07:44,566 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:07:44,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4148, Invalid=7624, Unknown=0, NotChecked=0, Total=11772 [2020-10-28 15:07:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:07:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 15:07:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 15:07:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-28 15:07:44,575 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-28 15:07:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:44,575 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-28 15:07:44,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 15:07:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-28 15:07:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 15:07:44,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:44,576 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:44,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:07:44,577 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1399353833, now seen corresponding path program 51 times [2020-10-28 15:07:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:44,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251279623] [2020-10-28 15:07:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3523 [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 15:07:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-28 15:07:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:50,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:50,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251279623] [2020-10-28 15:07:50,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:50,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 15:07:50,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996726720] [2020-10-28 15:07:50,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 15:07:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 15:07:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:07:50,103 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 57 states. [2020-10-28 15:07:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:54,176 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-28 15:07:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 15:07:54,177 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 115 [2020-10-28 15:07:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:54,178 INFO L225 Difference]: With dead ends: 126 [2020-10-28 15:07:54,178 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 15:07:54,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4307, Invalid=7903, Unknown=0, NotChecked=0, Total=12210 [2020-10-28 15:07:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 15:07:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 15:07:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 15:07:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-28 15:07:54,186 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-28 15:07:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:54,186 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-28 15:07:54,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 15:07:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-28 15:07:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 15:07:54,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:54,187 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:54,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:07:54,187 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 215266195, now seen corresponding path program 52 times [2020-10-28 15:07:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:54,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285586881] [2020-10-28 15:07:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3666 [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:57,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:57,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 15:07:57,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:57,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 15:07:57,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:59,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:59,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285586881] [2020-10-28 15:07:59,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:59,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 15:07:59,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622530081] [2020-10-28 15:07:59,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 15:07:59,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 15:07:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=1815, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 15:07:59,935 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 58 states. [2020-10-28 15:08:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:04,197 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-28 15:08:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 15:08:04,197 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 117 [2020-10-28 15:08:04,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:04,199 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:08:04,199 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:08:04,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4469, Invalid=8187, Unknown=0, NotChecked=0, Total=12656 [2020-10-28 15:08:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:08:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 15:08:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 15:08:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-28 15:08:04,208 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-28 15:08:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:04,208 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-28 15:08:04,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 15:08:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-28 15:08:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 15:08:04,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:04,209 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:04,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:08:04,209 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:04,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:04,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1381919247, now seen corresponding path program 53 times [2020-10-28 15:08:04,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:04,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91792901] [2020-10-28 15:08:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:08,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:08,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3816 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 15:08:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:10,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:10,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:10,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:10,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91792901] [2020-10-28 15:08:10,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:10,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 15:08:10,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685370863] [2020-10-28 15:08:10,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 15:08:10,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:10,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 15:08:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=1876, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:08:10,120 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 59 states. [2020-10-28 15:08:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:14,451 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-28 15:08:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 15:08:14,452 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 119 [2020-10-28 15:08:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:14,453 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:08:14,453 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:08:14,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4634, Invalid=8476, Unknown=0, NotChecked=0, Total=13110 [2020-10-28 15:08:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:08:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 15:08:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:08:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-28 15:08:14,462 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-28 15:08:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:14,462 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-28 15:08:14,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 15:08:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-28 15:08:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 15:08:14,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:14,463 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:14,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:08:14,464 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:14,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1549037963, now seen corresponding path program 54 times [2020-10-28 15:08:14,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:14,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024989787] [2020-10-28 15:08:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 15:08:18,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:18,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3925 [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 15:08:18,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:20,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:20,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:20,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:20,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:20,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024989787] [2020-10-28 15:08:20,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:20,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 15:08:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501529248] [2020-10-28 15:08:20,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 15:08:20,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 15:08:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 15:08:20,588 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 60 states. [2020-10-28 15:08:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:24,950 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-28 15:08:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 15:08:24,951 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 121 [2020-10-28 15:08:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:24,952 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:08:24,953 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:08:24,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4802, Invalid=8770, Unknown=0, NotChecked=0, Total=13572 [2020-10-28 15:08:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:08:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 15:08:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 15:08:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-28 15:08:24,965 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-28 15:08:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:24,966 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-28 15:08:24,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 15:08:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-28 15:08:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 15:08:24,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:24,967 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:24,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:08:24,967 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1058633209, now seen corresponding path program 55 times [2020-10-28 15:08:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:24,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077162216] [2020-10-28 15:08:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:25,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4249 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 15:08:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:31,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:31,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077162216] [2020-10-28 15:08:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:31,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 15:08:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116146040] [2020-10-28 15:08:31,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 15:08:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 15:08:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1659, Invalid=2001, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:08:31,505 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 61 states. [2020-10-28 15:08:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:36,116 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-28 15:08:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 15:08:36,117 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 123 [2020-10-28 15:08:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:36,118 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:08:36,118 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:08:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4973, Invalid=9069, Unknown=0, NotChecked=0, Total=14042 [2020-10-28 15:08:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:08:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-28 15:08:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 15:08:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-28 15:08:36,128 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-28 15:08:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:36,128 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-28 15:08:36,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 15:08:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-28 15:08:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 15:08:36,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:36,129 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:36,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:08:36,129 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1230271363, now seen corresponding path program 56 times [2020-10-28 15:08:36,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:36,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664237723] [2020-10-28 15:08:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:36,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking...