/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:03:56,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:03:56,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:03:56,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:03:56,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:03:56,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:03:56,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:03:56,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:03:56,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:03:56,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:03:56,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:03:56,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:03:56,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:03:56,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:03:56,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:03:56,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:03:56,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:03:56,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:03:56,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:03:56,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:03:56,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:03:56,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:03:56,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:03:56,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:03:56,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:03:56,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:03:56,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:03:56,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:03:56,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:03:56,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:03:56,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:03:56,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:03:56,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:03:56,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:03:56,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:03:56,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:03:56,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:03:56,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:03:56,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:03:56,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:03:56,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:03:56,406 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 [2020-10-26 23:03:56,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:03:56,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:03:56,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:03:56,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:03:56,438 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:03:56,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:03:56,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:03:56,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:03:56,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:03:56,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:03:56,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:03:56,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:03:56,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:03:56,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:03:56,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:03:56,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:03:56,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:03:56,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:03:56,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:03:56,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:03:56,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:03:56,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:03:56,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:03:56,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:03:56,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:03:56,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:03:56,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:03:56,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:03:56,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:03:56,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:03:56,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:03:56,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:03:56,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:03:56,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:03:56,935 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:03:56,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-26 23:03:57,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e9020475/05f948104bed457c8ec66a2e5dd049c7/FLAG97f720b3a [2020-10-26 23:03:58,158 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:03:58,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-26 23:03:58,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e9020475/05f948104bed457c8ec66a2e5dd049c7/FLAG97f720b3a [2020-10-26 23:03:58,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e9020475/05f948104bed457c8ec66a2e5dd049c7 [2020-10-26 23:03:58,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:03:58,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:03:58,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:03:58,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:03:58,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:03:58,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:58" (1/1) ... [2020-10-26 23:03:58,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a495bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:58, skipping insertion in model container [2020-10-26 23:03:58,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:58" (1/1) ... [2020-10-26 23:03:58,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:03:58,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:04:00,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:04:00,699 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:04:01,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:04:01,452 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:04:01,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01 WrapperNode [2020-10-26 23:04:01,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:04:01,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:04:01,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:04:01,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:04:01,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (1/1) ... [2020-10-26 23:04:01,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:04:01,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:04:01,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:04:01,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:04:01,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (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 [2020-10-26 23:04:01,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:04:01,921 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:04:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:04:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:04:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:04:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:04:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:04:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:04:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:04:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:04:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:04:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:04:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:04:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:04:11,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:04:11,919 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:04:11,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:04:11 BoogieIcfgContainer [2020-10-26 23:04:11,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:04:11,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:04:11,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:04:11,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:04:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:03:58" (1/3) ... [2020-10-26 23:04:11,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d65267e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:04:11, skipping insertion in model container [2020-10-26 23:04:11,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:04:01" (2/3) ... [2020-10-26 23:04:11,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d65267e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:04:11, skipping insertion in model container [2020-10-26 23:04:11,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:04:11" (3/3) ... [2020-10-26 23:04:11,934 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label06.c [2020-10-26 23:04:11,948 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:04:11,955 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:04:11,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:04:12,007 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:04:12,007 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:04:12,007 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:04:12,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:04:12,008 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:04:12,008 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:04:12,008 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:04:12,008 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:04:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:04:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 23:04:12,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:12,114 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] [2020-10-26 23:04:12,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -452148062, now seen corresponding path program 1 times [2020-10-26 23:04:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:12,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683519850] [2020-10-26 23:04:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:12,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:12,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:12,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 23:04:12,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:12,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-26 23:04:12,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:12,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:12,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:12,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 23:04:12,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:04:13,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:13,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:13,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 23:04:13,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:13,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:13,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683519850] [2020-10-26 23:04:13,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:13,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:04:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805843430] [2020-10-26 23:04:13,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:04:13,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:04:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:04:13,229 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:04:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:30,556 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-26 23:04:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:04:30,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-26 23:04:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:30,599 INFO L225 Difference]: With dead ends: 3157 [2020-10-26 23:04:30,600 INFO L226 Difference]: Without dead ends: 1955 [2020-10-26 23:04:30,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:04:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-26 23:04:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-26 23:04:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-26 23:04:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-26 23:04:30,838 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 32 [2020-10-26 23:04:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:30,842 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-26 23:04:30,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:04:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-26 23:04:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 23:04:30,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:30,854 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:04:30,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:04:30,855 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 922615984, now seen corresponding path program 1 times [2020-10-26 23:04:30,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:30,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203355482] [2020-10-26 23:04:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:32,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:32,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 23:04:32,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-26 23:04:32,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:32,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:04:32,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:04:32,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:32,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:32,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:32,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 23:04:32,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:04:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:32,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:33,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:33,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:04:33,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:33,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 23:04:33,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:04:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203355482] [2020-10-26 23:04:33,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:33,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933953955] [2020-10-26 23:04:33,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:33,239 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 7 states. [2020-10-26 23:05:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:04,937 INFO L93 Difference]: Finished difference Result 5684 states and 9353 transitions. [2020-10-26 23:05:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:05:04,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-26 23:05:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:04,971 INFO L225 Difference]: With dead ends: 5684 [2020-10-26 23:05:04,971 INFO L226 Difference]: Without dead ends: 3804 [2020-10-26 23:05:04,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:05:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2020-10-26 23:05:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3699. [2020-10-26 23:05:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3699 states. [2020-10-26 23:05:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5552 transitions. [2020-10-26 23:05:05,139 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5552 transitions. Word has length 102 [2020-10-26 23:05:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:05,140 INFO L481 AbstractCegarLoop]: Abstraction has 3699 states and 5552 transitions. [2020-10-26 23:05:05,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5552 transitions. [2020-10-26 23:05:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 23:05:05,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:05,151 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:05:05,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:05:05,152 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash 291905914, now seen corresponding path program 1 times [2020-10-26 23:05:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:05,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574408749] [2020-10-26 23:05:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:05:06,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:06,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-26 23:05:06,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:05:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:06,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:05:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:06,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:05:06,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:06,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:06,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:06,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:05:06,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:06,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 23:05:06,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:05:06,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:05:06,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574408749] [2020-10-26 23:05:06,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:05:06,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:05:06,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86922623] [2020-10-26 23:05:06,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:06,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:06,656 INFO L87 Difference]: Start difference. First operand 3699 states and 5552 transitions. Second operand 7 states. [2020-10-26 23:05:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:34,579 INFO L93 Difference]: Finished difference Result 11025 states and 16806 transitions. [2020-10-26 23:05:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:05:34,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-26 23:05:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:34,631 INFO L225 Difference]: With dead ends: 11025 [2020-10-26 23:05:34,631 INFO L226 Difference]: Without dead ends: 7332 [2020-10-26 23:05:34,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:05:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2020-10-26 23:05:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7129. [2020-10-26 23:05:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7129 states. [2020-10-26 23:05:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7129 states to 7129 states and 9938 transitions. [2020-10-26 23:05:34,885 INFO L78 Accepts]: Start accepts. Automaton has 7129 states and 9938 transitions. Word has length 107 [2020-10-26 23:05:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:34,886 INFO L481 AbstractCegarLoop]: Abstraction has 7129 states and 9938 transitions. [2020-10-26 23:05:34,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7129 states and 9938 transitions. [2020-10-26 23:05:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 23:05:34,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:34,890 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:05:34,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:05:34,890 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:34,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1182274774, now seen corresponding path program 1 times [2020-10-26 23:05:34,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:34,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363908816] [2020-10-26 23:05:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:36,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:05:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:05:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:36,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:36,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:36,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:36,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:36,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:05:36,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:36,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:36,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:36,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:37,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:37,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:05:37,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:37,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-26 23:05:37,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:37,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:05:37,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:05:37,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363908816] [2020-10-26 23:05:37,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:05:37,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:05:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840905070] [2020-10-26 23:05:37,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:37,188 INFO L87 Difference]: Start difference. First operand 7129 states and 9938 transitions. Second operand 7 states. [2020-10-26 23:05:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:58,387 INFO L93 Difference]: Finished difference Result 12035 states and 16881 transitions. [2020-10-26 23:05:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:05:58,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-26 23:05:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:58,422 INFO L225 Difference]: With dead ends: 12035 [2020-10-26 23:05:58,422 INFO L226 Difference]: Without dead ends: 4912 [2020-10-26 23:05:58,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:05:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2020-10-26 23:05:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4665. [2020-10-26 23:05:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4665 states. [2020-10-26 23:05:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 6569 transitions. [2020-10-26 23:05:58,599 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 6569 transitions. Word has length 147 [2020-10-26 23:05:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:58,601 INFO L481 AbstractCegarLoop]: Abstraction has 4665 states and 6569 transitions. [2020-10-26 23:05:58,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 6569 transitions. [2020-10-26 23:05:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-26 23:05:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:58,608 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:05:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:05:58,608 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1644890105, now seen corresponding path program 1 times [2020-10-26 23:05:58,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:58,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153056181] [2020-10-26 23:05:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:59,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:05:59,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:59,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-26 23:05:59,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:59,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:59,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:59,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:59,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:59,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:00,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:00,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:00,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:06:00,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-26 23:06:00,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:06:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:06:00,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153056181] [2020-10-26 23:06:00,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:00,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:06:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698967361] [2020-10-26 23:06:00,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:06:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:06:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:06:00,797 INFO L87 Difference]: Start difference. First operand 4665 states and 6569 transitions. Second operand 6 states. [2020-10-26 23:06:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:25,711 INFO L93 Difference]: Finished difference Result 12174 states and 18133 transitions. [2020-10-26 23:06:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 23:06:25,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2020-10-26 23:06:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:25,768 INFO L225 Difference]: With dead ends: 12174 [2020-10-26 23:06:25,769 INFO L226 Difference]: Without dead ends: 8318 [2020-10-26 23:06:25,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2020-10-26 23:06:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 8250. [2020-10-26 23:06:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8250 states. [2020-10-26 23:06:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8250 states to 8250 states and 10885 transitions. [2020-10-26 23:06:26,026 INFO L78 Accepts]: Start accepts. Automaton has 8250 states and 10885 transitions. Word has length 161 [2020-10-26 23:06:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:26,027 INFO L481 AbstractCegarLoop]: Abstraction has 8250 states and 10885 transitions. [2020-10-26 23:06:26,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:06:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8250 states and 10885 transitions. [2020-10-26 23:06:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 23:06:26,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:26,032 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, 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] [2020-10-26 23:06:26,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:06:26,033 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 464336481, now seen corresponding path program 1 times [2020-10-26 23:06:26,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600421423] [2020-10-26 23:06:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:26,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:29,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:29,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-26 23:06:29,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2931 [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 23:06:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:29,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:29,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:29,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:29,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:06:29,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:29,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:29,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:29,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:06:29,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:29,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 23:06:29,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:29,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:29,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:29,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:06:29,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:06:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:29,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:29,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:29,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:06:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-26 23:06:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600421423] [2020-10-26 23:06:30,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:30,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:06:30,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368253228] [2020-10-26 23:06:30,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:06:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:06:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:30,031 INFO L87 Difference]: Start difference. First operand 8250 states and 10885 transitions. Second operand 7 states. [2020-10-26 23:07:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:05,211 INFO L93 Difference]: Finished difference Result 18675 states and 25163 transitions. [2020-10-26 23:07:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:07:05,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 221 [2020-10-26 23:07:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:05,251 INFO L225 Difference]: With dead ends: 18675 [2020-10-26 23:07:05,251 INFO L226 Difference]: Without dead ends: 11234 [2020-10-26 23:07:05,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:07:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2020-10-26 23:07:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 10976. [2020-10-26 23:07:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10976 states. [2020-10-26 23:07:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10976 states to 10976 states and 14188 transitions. [2020-10-26 23:07:05,543 INFO L78 Accepts]: Start accepts. Automaton has 10976 states and 14188 transitions. Word has length 221 [2020-10-26 23:07:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:05,544 INFO L481 AbstractCegarLoop]: Abstraction has 10976 states and 14188 transitions. [2020-10-26 23:07:05,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:07:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10976 states and 14188 transitions. [2020-10-26 23:07:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 23:07:05,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:05,550 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, 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] [2020-10-26 23:07:05,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:07:05,550 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash 293471490, now seen corresponding path program 1 times [2020-10-26 23:07:05,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:05,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825458856] [2020-10-26 23:07:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:05,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:07,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:08,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:08,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 23:07:08,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:07:08,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3364 [2020-10-26 23:07:08,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:07:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:07:08,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:09,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:09,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:09,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:09,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:09,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:09,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:07:09,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:09,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:09,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:09,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:09,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:07:09,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:09,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:09,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:07:09,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:07:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:09,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:07:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:09,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:09,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:07:09,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:09,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 23:07:09,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:07:09,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:07:10,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825458856] [2020-10-26 23:07:10,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:07:10,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:07:10,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831056211] [2020-10-26 23:07:10,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:07:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:07:10,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:07:10,065 INFO L87 Difference]: Start difference. First operand 10976 states and 14188 transitions. Second operand 8 states. [2020-10-26 23:07:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:43,957 INFO L93 Difference]: Finished difference Result 30385 states and 41754 transitions. [2020-10-26 23:07:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:07:43,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 23:07:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:44,041 INFO L225 Difference]: With dead ends: 30385 [2020-10-26 23:07:44,041 INFO L226 Difference]: Without dead ends: 20218 [2020-10-26 23:07:44,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:07:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-10-26 23:07:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 19873. [2020-10-26 23:07:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19873 states. [2020-10-26 23:07:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19873 states to 19873 states and 24847 transitions. [2020-10-26 23:07:44,572 INFO L78 Accepts]: Start accepts. Automaton has 19873 states and 24847 transitions. Word has length 237 [2020-10-26 23:07:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:44,572 INFO L481 AbstractCegarLoop]: Abstraction has 19873 states and 24847 transitions. [2020-10-26 23:07:44,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:07:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19873 states and 24847 transitions. [2020-10-26 23:07:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-26 23:07:44,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:44,577 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, 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] [2020-10-26 23:07:44,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:07:44,578 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -990286435, now seen corresponding path program 1 times [2020-10-26 23:07:44,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:44,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925250011] [2020-10-26 23:07:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:45,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:45,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-26 23:07:45,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:07:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-26 23:07:45,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:07:45,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:07:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:46,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:46,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:46,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:46,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:07:46,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:07:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:07:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:46,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:46,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:07:46,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 23:07:46,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:07:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:07:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:46,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:07:46,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:46,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-26 23:07:46,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:07:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:07:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925250011] [2020-10-26 23:07:46,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:07:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:07:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041075682] [2020-10-26 23:07:46,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:07:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:07:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:07:46,951 INFO L87 Difference]: Start difference. First operand 19873 states and 24847 transitions. Second operand 8 states. [2020-10-26 23:07:47,112 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66