/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/eca-rers2012/Problem03_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:11:58,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:11:58,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:11:58,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:11:58,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:11:58,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:11:58,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:11:58,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:11:58,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:11:58,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:11:58,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:11:58,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:11:58,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:11:58,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:11:58,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:11:58,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:11:58,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:11:58,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:11:58,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:11:58,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:11:58,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:11:58,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:11:58,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:11:58,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:11:58,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:11:58,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:11:58,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:11:58,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:11:58,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:11:58,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:11:58,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:11:58,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:11:58,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:11:58,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:11:58,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:11:58,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:11:58,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:11:58,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:11:58,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:11:58,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:11:58,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:11:58,852 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 10:11:58,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:11:58,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:11:58,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:11:58,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:11:58,928 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:11:58,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:11:58,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:11:58,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:11:58,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:11:58,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:11:58,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:11:58,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:11:58,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:11:58,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:11:58,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:11:58,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:11:58,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:11:58,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:11:58,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:11:58,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:11:58,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:11:58,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:11:58,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:11:58,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:11:58,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:11:58,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:11:58,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:11:58,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:11:58,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:11:58,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:11:59,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:11:59,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:11:59,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:11:59,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:11:59,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:11:59,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07.c [2020-10-28 10:11:59,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ae289a21/14e24c2036c042fa9224ec367bdb1352/FLAG20458e5aa [2020-10-28 10:12:00,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:12:00,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label07.c [2020-10-28 10:12:00,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ae289a21/14e24c2036c042fa9224ec367bdb1352/FLAG20458e5aa [2020-10-28 10:12:00,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ae289a21/14e24c2036c042fa9224ec367bdb1352 [2020-10-28 10:12:00,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:12:00,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:12:00,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:00,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:12:00,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:12:00,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:00" (1/1) ... [2020-10-28 10:12:00,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4faa6143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:00, skipping insertion in model container [2020-10-28 10:12:00,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:00" (1/1) ... [2020-10-28 10:12:00,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:12:00,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:12:01,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:01,350 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:12:01,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:01,644 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:12:01,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01 WrapperNode [2020-10-28 10:12:01,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:01,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:12:01,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:12:01,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:12:01,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (1/1) ... [2020-10-28 10:12:01,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:12:01,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:12:01,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:12:01,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:12:01,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (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 10:12:01,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:12:01,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:12:01,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:12:01,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:12:01,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:12:01,973 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:12:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:12:01,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:12:01,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:12:01,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:12:01,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:12:01,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:12:01,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:12:01,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:12:05,321 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:12:05,321 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:12:05,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:05 BoogieIcfgContainer [2020-10-28 10:12:05,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:12:05,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:12:05,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:12:05,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:12:05,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:12:00" (1/3) ... [2020-10-28 10:12:05,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e59f5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:05, skipping insertion in model container [2020-10-28 10:12:05,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:01" (2/3) ... [2020-10-28 10:12:05,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e59f5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:05, skipping insertion in model container [2020-10-28 10:12:05,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:05" (3/3) ... [2020-10-28 10:12:05,335 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2020-10-28 10:12:05,348 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:12:05,354 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:12:05,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:12:05,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:12:05,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:12:05,400 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:12:05,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:12:05,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:12:05,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:12:05,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:12:05,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:12:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:12:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 10:12:05,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:05,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:05,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1408369932, now seen corresponding path program 1 times [2020-10-28 10:12:05,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883399148] [2020-10-28 10:12:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:06,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:06,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:10,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:10,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 10:12:10,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:10,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4363 [2020-10-28 10:12:10,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:10,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:12:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-28 10:12:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:12:10,965 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:10,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:11,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:11,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:11,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:11,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:12:11,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:11,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:11,163 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 10:12:11,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883399148] [2020-10-28 10:12:11,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:12:11,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:12:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890085648] [2020-10-28 10:12:11,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:12:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:11,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:12:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:12:11,192 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:12:11,737 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:16,433 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-28 10:12:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:16,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2020-10-28 10:12:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:16,473 INFO L225 Difference]: With dead ends: 889 [2020-10-28 10:12:16,473 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 10:12:16,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 10:12:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-28 10:12:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 10:12:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-28 10:12:16,618 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 179 [2020-10-28 10:12:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:16,619 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-28 10:12:16,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:12:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-28 10:12:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-28 10:12:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:16,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:16,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:12:16,628 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash 339711267, now seen corresponding path program 1 times [2020-10-28 10:12:16,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:16,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524601146] [2020-10-28 10:12:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:19,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:19,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-28 10:12:19,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:19,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3145 [2020-10-28 10:12:19,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:19,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:19,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:12:19,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:12:19,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:20,499 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:20,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:20,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:20,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:20,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:12:20,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:20,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:20,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:20,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:20,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-28 10:12:20,730 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:20,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:20,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:20,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:20,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:20,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:20,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:12:20,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:20,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524601146] [2020-10-28 10:12:20,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:20,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:20,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071308952] [2020-10-28 10:12:20,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:20,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:20,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:20,946 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 5 states. [2020-10-28 10:12:21,589 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:26,368 INFO L93 Difference]: Finished difference Result 1396 states and 2172 transitions. [2020-10-28 10:12:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:26,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 188 [2020-10-28 10:12:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:26,377 INFO L225 Difference]: With dead ends: 1396 [2020-10-28 10:12:26,378 INFO L226 Difference]: Without dead ends: 926 [2020-10-28 10:12:26,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-10-28 10:12:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 904. [2020-10-28 10:12:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-10-28 10:12:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1372 transitions. [2020-10-28 10:12:26,444 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1372 transitions. Word has length 188 [2020-10-28 10:12:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:26,445 INFO L481 AbstractCegarLoop]: Abstraction has 904 states and 1372 transitions. [2020-10-28 10:12:26,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1372 transitions. [2020-10-28 10:12:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 10:12:26,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:26,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:12:26,452 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash 525433397, now seen corresponding path program 1 times [2020-10-28 10:12:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:26,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465085881] [2020-10-28 10:12:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:27,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:28,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:28,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 10:12:28,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2390 [2020-10-28 10:12:28,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:28,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:12:28,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:12:28,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 10:12:29,635 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:29,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:29,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:29,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:29,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:29,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 10:12:29,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:29,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:29,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:29,866 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:29,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:29,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:29,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:12:29,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:12:29,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:29,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:12:29,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:30,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465085881] [2020-10-28 10:12:30,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:30,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:30,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979813868] [2020-10-28 10:12:30,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:30,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:30,049 INFO L87 Difference]: Start difference. First operand 904 states and 1372 transitions. Second operand 5 states. [2020-10-28 10:12:30,694 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:35,276 INFO L93 Difference]: Finished difference Result 2653 states and 4096 transitions. [2020-10-28 10:12:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:35,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-10-28 10:12:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:35,305 INFO L225 Difference]: With dead ends: 2653 [2020-10-28 10:12:35,305 INFO L226 Difference]: Without dead ends: 1755 [2020-10-28 10:12:35,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2020-10-28 10:12:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1748. [2020-10-28 10:12:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1748 states. [2020-10-28 10:12:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2562 transitions. [2020-10-28 10:12:35,411 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2562 transitions. Word has length 191 [2020-10-28 10:12:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:35,412 INFO L481 AbstractCegarLoop]: Abstraction has 1748 states and 2562 transitions. [2020-10-28 10:12:35,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2562 transitions. [2020-10-28 10:12:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 10:12:35,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:35,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:35,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:12:35,421 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1384060407, now seen corresponding path program 1 times [2020-10-28 10:12:35,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73723886] [2020-10-28 10:12:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:35,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:38,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:40,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 10:12:40,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:12:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 10:12:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:40,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:12:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-28 10:12:40,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:41,093 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:41,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:41,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:41,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:41,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:41,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:12:41,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:41,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:41,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:41,312 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:41,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:41,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:41,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:41,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:41,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:12:41,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:41,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:41,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:41,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:41,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:41,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:41,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:12:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:41,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:12:41,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73723886] [2020-10-28 10:12:41,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:41,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523781023] [2020-10-28 10:12:41,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:41,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:41,467 INFO L87 Difference]: Start difference. First operand 1748 states and 2562 transitions. Second operand 5 states. [2020-10-28 10:12:42,295 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:46,516 INFO L93 Difference]: Finished difference Result 5172 states and 7642 transitions. [2020-10-28 10:12:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:46,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-10-28 10:12:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:46,539 INFO L225 Difference]: With dead ends: 5172 [2020-10-28 10:12:46,539 INFO L226 Difference]: Without dead ends: 1751 [2020-10-28 10:12:46,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2020-10-28 10:12:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1747. [2020-10-28 10:12:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1747 states. [2020-10-28 10:12:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2560 transitions. [2020-10-28 10:12:46,618 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2560 transitions. Word has length 198 [2020-10-28 10:12:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:46,618 INFO L481 AbstractCegarLoop]: Abstraction has 1747 states and 2560 transitions. [2020-10-28 10:12:46,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2560 transitions. [2020-10-28 10:12:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-28 10:12:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:46,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:46,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:12:46,626 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1288073737, now seen corresponding path program 1 times [2020-10-28 10:12:46,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:46,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929402903] [2020-10-28 10:12:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:49,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:49,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-28 10:12:49,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-28 10:12:49,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:49,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:12:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:12:49,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:12:49,922 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:49,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:49,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:49,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:12:49,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:49,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:50,126 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:50,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:50,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:50,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:12:50,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:12:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:50,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929402903] [2020-10-28 10:12:50,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:50,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:50,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040746859] [2020-10-28 10:12:50,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:50,310 INFO L87 Difference]: Start difference. First operand 1747 states and 2560 transitions. Second operand 5 states. [2020-10-28 10:12:50,821 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:12:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:55,121 INFO L93 Difference]: Finished difference Result 5177 states and 7800 transitions. [2020-10-28 10:12:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:55,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2020-10-28 10:12:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:55,157 INFO L225 Difference]: With dead ends: 5177 [2020-10-28 10:12:55,158 INFO L226 Difference]: Without dead ends: 3436 [2020-10-28 10:12:55,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2020-10-28 10:12:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2020-10-28 10:12:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3424 states. [2020-10-28 10:12:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4881 transitions. [2020-10-28 10:12:55,329 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4881 transitions. Word has length 198 [2020-10-28 10:12:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:55,329 INFO L481 AbstractCegarLoop]: Abstraction has 3424 states and 4881 transitions. [2020-10-28 10:12:55,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4881 transitions. [2020-10-28 10:12:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 10:12:55,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:55,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:55,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:12:55,342 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2018896654, now seen corresponding path program 1 times [2020-10-28 10:12:55,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:55,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379589320] [2020-10-28 10:12:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:55,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:00,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:00,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-28 10:13:00,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:00,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 10:13:00,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:00,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:13:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-28 10:13:00,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:00,968 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:00,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:00,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:00,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:00,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:00,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:01,172 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:01,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:01,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:13:01,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:01,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:01,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:01,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:01,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:01,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:01,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:13:01,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:01,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:13:01,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:01,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:13:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:13:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:01,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379589320] [2020-10-28 10:13:01,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:01,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:01,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459510084] [2020-10-28 10:13:01,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:01,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:01,439 INFO L87 Difference]: Start difference. First operand 3424 states and 4881 transitions. Second operand 5 states. [2020-10-28 10:13:02,004 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:06,468 INFO L93 Difference]: Finished difference Result 9984 states and 14674 transitions. [2020-10-28 10:13:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:06,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2020-10-28 10:13:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:06,513 INFO L225 Difference]: With dead ends: 9984 [2020-10-28 10:13:06,514 INFO L226 Difference]: Without dead ends: 6566 [2020-10-28 10:13:06,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2020-10-28 10:13:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 6145. [2020-10-28 10:13:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6145 states. [2020-10-28 10:13:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6145 states to 6145 states and 8885 transitions. [2020-10-28 10:13:06,762 INFO L78 Accepts]: Start accepts. Automaton has 6145 states and 8885 transitions. Word has length 215 [2020-10-28 10:13:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:06,763 INFO L481 AbstractCegarLoop]: Abstraction has 6145 states and 8885 transitions. [2020-10-28 10:13:06,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6145 states and 8885 transitions. [2020-10-28 10:13:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 10:13:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:06,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:06,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:13:06,785 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2072107533, now seen corresponding path program 1 times [2020-10-28 10:13:06,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:06,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672649164] [2020-10-28 10:13:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:06,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:06,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:07,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:11,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 10:13:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:13:11,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:12,437 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:12,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:12,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:12,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:12,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:12,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:12,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:12,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:12,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:12,637 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:12,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:12,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:12,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:13:12,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:12,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:12,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:12,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:12,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:12,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 10:13:12,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:13:12,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:12,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 10:13:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:12,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672649164] [2020-10-28 10:13:12,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:12,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701598943] [2020-10-28 10:13:12,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:12,815 INFO L87 Difference]: Start difference. First operand 6145 states and 8885 transitions. Second operand 5 states. [2020-10-28 10:13:13,331 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:17,772 INFO L93 Difference]: Finished difference Result 15423 states and 22736 transitions. [2020-10-28 10:13:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:17,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2020-10-28 10:13:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:17,835 INFO L225 Difference]: With dead ends: 15423 [2020-10-28 10:13:17,836 INFO L226 Difference]: Without dead ends: 9284 [2020-10-28 10:13:17,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2020-10-28 10:13:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 9280. [2020-10-28 10:13:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9280 states. [2020-10-28 10:13:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9280 states to 9280 states and 12556 transitions. [2020-10-28 10:13:18,194 INFO L78 Accepts]: Start accepts. Automaton has 9280 states and 12556 transitions. Word has length 227 [2020-10-28 10:13:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:18,194 INFO L481 AbstractCegarLoop]: Abstraction has 9280 states and 12556 transitions. [2020-10-28 10:13:18,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9280 states and 12556 transitions. [2020-10-28 10:13:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-28 10:13:18,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:18,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:18,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:13:18,225 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1588501798, now seen corresponding path program 1 times [2020-10-28 10:13:18,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60889044] [2020-10-28 10:13:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:18,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:20,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:13:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 10:13:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,778 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:23,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:23,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:13:23,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,979 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:23,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:23,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:23,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:23,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:23,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:23,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:24,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:13:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:24,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:13:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:24,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:24,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:24,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:13:24,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:13:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:13:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60889044] [2020-10-28 10:13:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372877145] [2020-10-28 10:13:24,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:24,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:24,217 INFO L87 Difference]: Start difference. First operand 9280 states and 12556 transitions. Second operand 7 states. [2020-10-28 10:13:24,944 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:25,622 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:34,561 INFO L93 Difference]: Finished difference Result 37635 states and 55765 transitions. [2020-10-28 10:13:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:34,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-10-28 10:13:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:34,750 INFO L225 Difference]: With dead ends: 37635 [2020-10-28 10:13:34,750 INFO L226 Difference]: Without dead ends: 28361 [2020-10-28 10:13:34,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28361 states. [2020-10-28 10:13:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28361 to 28350. [2020-10-28 10:13:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28350 states. [2020-10-28 10:13:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28350 states to 28350 states and 42023 transitions. [2020-10-28 10:13:36,177 INFO L78 Accepts]: Start accepts. Automaton has 28350 states and 42023 transitions. Word has length 236 [2020-10-28 10:13:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:36,178 INFO L481 AbstractCegarLoop]: Abstraction has 28350 states and 42023 transitions. [2020-10-28 10:13:36,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28350 states and 42023 transitions. [2020-10-28 10:13:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 10:13:36,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:36,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:36,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:13:36,542 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1790041109, now seen corresponding path program 1 times [2020-10-28 10:13:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:36,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893200523] [2020-10-28 10:13:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:37,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:40,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:41,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:41,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 10:13:41,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 10:13:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:42,155 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:42,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:42,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:42,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:42,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:42,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:13:42,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:42,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:42,355 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:42,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:42,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:42,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:42,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:42,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 10:13:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893200523] [2020-10-28 10:13:42,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:42,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510984690] [2020-10-28 10:13:42,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:42,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:42,564 INFO L87 Difference]: Start difference. First operand 28350 states and 42023 transitions. Second operand 5 states. [2020-10-28 10:13:43,165 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:49,011 INFO L93 Difference]: Finished difference Result 61204 states and 90976 transitions. [2020-10-28 10:13:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:49,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2020-10-28 10:13:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:49,230 INFO L225 Difference]: With dead ends: 61204 [2020-10-28 10:13:49,230 INFO L226 Difference]: Without dead ends: 32860 [2020-10-28 10:13:49,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32860 states. [2020-10-28 10:13:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32860 to 30906. [2020-10-28 10:13:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30906 states. [2020-10-28 10:13:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30906 states to 30906 states and 46255 transitions. [2020-10-28 10:13:50,663 INFO L78 Accepts]: Start accepts. Automaton has 30906 states and 46255 transitions. Word has length 238 [2020-10-28 10:13:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:50,663 INFO L481 AbstractCegarLoop]: Abstraction has 30906 states and 46255 transitions. [2020-10-28 10:13:50,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30906 states and 46255 transitions. [2020-10-28 10:13:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-28 10:13:51,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:51,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:51,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:13:51,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1258390877, now seen corresponding path program 1 times [2020-10-28 10:13:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:51,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209408007] [2020-10-28 10:13:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 10:13:56,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:13:56,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 10:13:56,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:13:56,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 10:13:56,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,673 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:56,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:56,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:56,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,884 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:56,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:56,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:56,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:56,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:13:56,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:56,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:13:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:57,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:57,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 10:13:57,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:57,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 10:13:57,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:57,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 10:13:57,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:57,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 10:13:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:57,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:57,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:57,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:13:57,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:13:57,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:57,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 10:13:57,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:57,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 10:13:57,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209408007] [2020-10-28 10:13:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:57,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424429558] [2020-10-28 10:13:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:57,335 INFO L87 Difference]: Start difference. First operand 30906 states and 46255 transitions. Second operand 7 states. [2020-10-28 10:13:58,020 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:59,096 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:04,465 INFO L93 Difference]: Finished difference Result 61961 states and 94447 transitions. [2020-10-28 10:14:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:04,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 266 [2020-10-28 10:14:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:04,650 INFO L225 Difference]: With dead ends: 61961 [2020-10-28 10:14:04,650 INFO L226 Difference]: Without dead ends: 31061 [2020-10-28 10:14:04,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:04,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31061 states. [2020-10-28 10:14:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31061 to 28722. [2020-10-28 10:14:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28722 states. [2020-10-28 10:14:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28722 states to 28722 states and 39304 transitions. [2020-10-28 10:14:06,078 INFO L78 Accepts]: Start accepts. Automaton has 28722 states and 39304 transitions. Word has length 266 [2020-10-28 10:14:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:06,079 INFO L481 AbstractCegarLoop]: Abstraction has 28722 states and 39304 transitions. [2020-10-28 10:14:06,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28722 states and 39304 transitions. [2020-10-28 10:14:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 10:14:06,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:06,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:06,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:14:06,477 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 534757837, now seen corresponding path program 1 times [2020-10-28 10:14:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:06,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26953743] [2020-10-28 10:14:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:11,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:11,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 10:14:11,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 10:14:11,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:11,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:14:11,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 10:14:11,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,124 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:12,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:12,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:12,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,336 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:12,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:12,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:14:12,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 10:14:12,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:14:12,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:12,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:14:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:12,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 10:14:12,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 10:14:12,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:14:13,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26953743] [2020-10-28 10:14:13,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:13,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370996669] [2020-10-28 10:14:13,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:13,326 INFO L87 Difference]: Start difference. First operand 28722 states and 39304 transitions. Second operand 7 states. [2020-10-28 10:14:14,247 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:14:15,606 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 10:14:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:22,162 INFO L93 Difference]: Finished difference Result 71755 states and 111292 transitions. [2020-10-28 10:14:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:22,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 299 [2020-10-28 10:14:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:22,494 INFO L225 Difference]: With dead ends: 71755 [2020-10-28 10:14:22,495 INFO L226 Difference]: Without dead ends: 43039 [2020-10-28 10:14:22,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:14:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43039 states. [2020-10-28 10:14:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43039 to 41056. [2020-10-28 10:14:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41056 states. [2020-10-28 10:14:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41056 states to 41056 states and 55751 transitions. [2020-10-28 10:14:24,478 INFO L78 Accepts]: Start accepts. Automaton has 41056 states and 55751 transitions. Word has length 299 [2020-10-28 10:14:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:24,478 INFO L481 AbstractCegarLoop]: Abstraction has 41056 states and 55751 transitions. [2020-10-28 10:14:24,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41056 states and 55751 transitions. [2020-10-28 10:14:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 10:14:24,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:24,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:24,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:14:24,577 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:24,578 INFO L82 PathProgramCache]: Analyzing trace with hash -193538689, now seen corresponding path program 1 times [2020-10-28 10:14:24,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:24,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184175046] [2020-10-28 10:14:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:24,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:29,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 10:14:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 10:14:29,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,166 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:30,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:30,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:14:30,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:30,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,363 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:30,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:14:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 10:14:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:30,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:30,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 10:14:30,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-28 10:14:30,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:30,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 10:14:30,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:14:30,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184175046] [2020-10-28 10:14:30,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:30,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:30,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783837904] [2020-10-28 10:14:30,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:30,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:30,784 INFO L87 Difference]: Start difference. First operand 41056 states and 55751 transitions. Second operand 7 states. [2020-10-28 10:14:31,280 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:34,544 INFO L93 Difference]: Finished difference Result 75177 states and 101413 transitions. [2020-10-28 10:14:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 10:14:34,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 305 [2020-10-28 10:14:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:34,710 INFO L225 Difference]: With dead ends: 75177 [2020-10-28 10:14:34,710 INFO L226 Difference]: Without dead ends: 34127 [2020-10-28 10:14:34,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:14:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34127 states. [2020-10-28 10:14:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34127 to 34115. [2020-10-28 10:14:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34115 states. [2020-10-28 10:14:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34115 states to 34115 states and 43646 transitions. [2020-10-28 10:14:36,328 INFO L78 Accepts]: Start accepts. Automaton has 34115 states and 43646 transitions. Word has length 305 [2020-10-28 10:14:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 34115 states and 43646 transitions. [2020-10-28 10:14:36,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 34115 states and 43646 transitions. [2020-10-28 10:14:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 10:14:36,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:36,406 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:36,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:14:36,406 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1443840806, now seen corresponding path program 1 times [2020-10-28 10:14:36,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:36,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691985636] [2020-10-28 10:14:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:41,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 348 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:14:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 10:14:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:42,131 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:42,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:14:42,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:42,352 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:42,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:42,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:42,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 10:14:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:42,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-28 10:14:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:42,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:42,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:14:42,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 148 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 10:14:43,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691985636] [2020-10-28 10:14:43,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:43,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873698616] [2020-10-28 10:14:43,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:14:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:14:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:43,090 INFO L87 Difference]: Start difference. First operand 34115 states and 43646 transitions. Second operand 8 states. [2020-10-28 10:14:43,648 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:45,492 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:14:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:49,990 INFO L93 Difference]: Finished difference Result 79029 states and 102941 transitions. [2020-10-28 10:14:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:14:49,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 334 [2020-10-28 10:14:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:50,307 INFO L225 Difference]: With dead ends: 79029 [2020-10-28 10:14:50,308 INFO L226 Difference]: Without dead ends: 44920 [2020-10-28 10:14:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:14:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44920 states. [2020-10-28 10:14:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44920 to 44709. [2020-10-28 10:14:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44709 states. [2020-10-28 10:14:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44709 states to 44709 states and 57217 transitions. [2020-10-28 10:14:52,024 INFO L78 Accepts]: Start accepts. Automaton has 44709 states and 57217 transitions. Word has length 334 [2020-10-28 10:14:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:52,025 INFO L481 AbstractCegarLoop]: Abstraction has 44709 states and 57217 transitions. [2020-10-28 10:14:52,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:14:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 44709 states and 57217 transitions. [2020-10-28 10:14:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-28 10:14:52,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:52,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:52,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:14:52,152 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1683121964, now seen corresponding path program 1 times [2020-10-28 10:14:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:52,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991252500] [2020-10-28 10:14:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:52,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:57,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-28 10:14:57,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 10:14:57,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:57,813 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:57,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:57,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:57,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:57,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,007 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:58,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 10:14:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 10:14:58,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 10:14:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 10:14:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 10:14:58,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 10:14:58,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-28 10:14:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:58,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 10:14:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 272 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 10:14:58,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991252500] [2020-10-28 10:14:58,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:58,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 10:14:58,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21536395] [2020-10-28 10:14:58,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 10:14:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 10:14:58,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:14:58,603 INFO L87 Difference]: Start difference. First operand 44709 states and 57217 transitions. Second operand 9 states. [2020-10-28 10:14:59,260 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:01,056 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:12,056 INFO L93 Difference]: Finished difference Result 174691 states and 248058 transitions. [2020-10-28 10:15:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:12,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 357 [2020-10-28 10:15:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:12,938 INFO L225 Difference]: With dead ends: 174691 [2020-10-28 10:15:12,938 INFO L226 Difference]: Without dead ends: 130828 [2020-10-28 10:15:13,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-28 10:15:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130828 states. [2020-10-28 10:15:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130828 to 129485. [2020-10-28 10:15:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129485 states. [2020-10-28 10:15:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129485 states to 129485 states and 185358 transitions. [2020-10-28 10:15:19,746 INFO L78 Accepts]: Start accepts. Automaton has 129485 states and 185358 transitions. Word has length 357 [2020-10-28 10:15:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:19,747 INFO L481 AbstractCegarLoop]: Abstraction has 129485 states and 185358 transitions. [2020-10-28 10:15:19,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 10:15:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 129485 states and 185358 transitions. [2020-10-28 10:15:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-28 10:15:20,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:20,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:20,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:15:20,259 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1230158817, now seen corresponding path program 1 times [2020-10-28 10:15:20,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:20,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678697841] [2020-10-28 10:15:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:20,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking...