/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=DEEPEST --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/Problem17_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:51:54,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:51:54,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:51:54,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:51:54,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:51:54,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:51:54,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:51:54,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:51:54,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:51:54,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:51:54,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:51:54,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:51:54,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:51:54,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:51:54,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:51:54,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:51:54,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:51:54,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:51:54,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:51:54,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:51:54,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:51:54,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:51:54,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:51:54,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:51:54,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:51:54,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:51:54,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:51:54,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:51:54,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:51:54,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:51:54,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:51:54,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:51:54,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:51:54,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:51:54,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:51:54,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:51:54,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:51:54,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:51:54,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:51:54,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:51:54,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:51:54,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:51:54,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:51:54,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:51:54,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:51:54,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:51:54,499 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:51:54,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:51:54,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:51:54,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:51:54,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:51:54,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:51:54,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:51:54,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:51:54,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:51:54,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:51:54,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:51:54,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:51:54,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:51:54,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:51:54,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:51:54,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:51:54,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:51:54,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:51:54,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:51:54,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:51:54,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:51:54,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:51:54,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:51:54,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:51:54,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:51:54,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:51:55,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:51:55,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:51:55,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:51:55,100 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:51:55,101 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:51:55,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label18.c [2020-10-27 18:51:55,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5a8a195c/ab38055170be4f839833aa922c03d90a/FLAG80a35fcc7 [2020-10-27 18:51:56,210 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:51:56,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label18.c [2020-10-27 18:51:56,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5a8a195c/ab38055170be4f839833aa922c03d90a/FLAG80a35fcc7 [2020-10-27 18:51:56,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5a8a195c/ab38055170be4f839833aa922c03d90a [2020-10-27 18:51:56,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:51:56,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:51:56,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:51:56,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:51:56,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:51:56,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:51:56" (1/1) ... [2020-10-27 18:51:56,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a7e491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:56, skipping insertion in model container [2020-10-27 18:51:56,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:51:56" (1/1) ... [2020-10-27 18:51:56,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:51:56,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:51:57,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:51:57,826 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:51:58,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:51:58,337 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:51:58,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58 WrapperNode [2020-10-27 18:51:58,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:51:58,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:51:58,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:51:58,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:51:58,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... [2020-10-27 18:51:58,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:51:58,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:51:58,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:51:58,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:51:58,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:51:58,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:51:58,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:51:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:51:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:51:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:51:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:51:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:51:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:51:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:51:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:51:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:51:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:51:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:51:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:51:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:51:58,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:51:58,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:51:58,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:51:58,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:51:58,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:51:58,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:52:08,828 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:52:08,829 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:52:08,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:52:08 BoogieIcfgContainer [2020-10-27 18:52:08,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:52:08,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:52:08,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:52:08,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:52:08,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:51:56" (1/3) ... [2020-10-27 18:52:08,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e5e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:52:08, skipping insertion in model container [2020-10-27 18:52:08,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:51:58" (2/3) ... [2020-10-27 18:52:08,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e5e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:52:08, skipping insertion in model container [2020-10-27 18:52:08,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:52:08" (3/3) ... [2020-10-27 18:52:08,850 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label18.c [2020-10-27 18:52:08,868 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:52:08,876 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:52:08,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:52:08,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:52:08,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:52:08,944 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:52:08,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:52:08,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:52:08,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:52:08,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:52:08,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:52:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:52:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 18:52:09,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:09,013 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] [2020-10-27 18:52:09,013 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2063605562, now seen corresponding path program 1 times [2020-10-27 18:52:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:09,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386807397] [2020-10-27 18:52:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:10,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:10,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:52:10,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:10,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-27 18:52:10,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:10,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:52:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:52:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 18:52:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:52:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:10,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:10,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:10,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:10,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 18:52:10,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:52:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:10,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386807397] [2020-10-27 18:52:10,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:52:10,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:52:10,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774139851] [2020-10-27 18:52:10,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:52:10,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:10,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:52:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:52:10,512 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:52:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:22,869 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 18:52:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:52:22,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-27 18:52:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:22,915 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 18:52:22,915 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 18:52:22,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:52:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 18:52:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 18:52:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 18:52:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 18:52:23,112 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 62 [2020-10-27 18:52:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:23,113 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 18:52:23,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:52:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 18:52:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 18:52:23,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:23,134 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:52:23,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:52:23,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1259338298, now seen corresponding path program 1 times [2020-10-27 18:52:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:23,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532023] [2020-10-27 18:52:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:24,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:24,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 18:52:24,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:52:24,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1666 [2020-10-27 18:52:24,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:52:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:52:24,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:52:24,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:52:25,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:25,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:25,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:25,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:52:25,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:52:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:52:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:25,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:25,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:52:25,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:25,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:52:25,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:25,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:52:25,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:25,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532023] [2020-10-27 18:52:25,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:25,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:52:25,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103486385] [2020-10-27 18:52:25,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:52:25,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:25,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:52:25,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:52:25,248 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 5 states. [2020-10-27 18:52:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:38,790 INFO L93 Difference]: Finished difference Result 2866 states and 4442 transitions. [2020-10-27 18:52:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:52:38,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-10-27 18:52:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:38,808 INFO L225 Difference]: With dead ends: 2866 [2020-10-27 18:52:38,809 INFO L226 Difference]: Without dead ends: 1880 [2020-10-27 18:52:38,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:52:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-10-27 18:52:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1876. [2020-10-27 18:52:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2020-10-27 18:52:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2567 transitions. [2020-10-27 18:52:38,949 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2567 transitions. Word has length 133 [2020-10-27 18:52:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:38,952 INFO L481 AbstractCegarLoop]: Abstraction has 1876 states and 2567 transitions. [2020-10-27 18:52:38,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:52:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2567 transitions. [2020-10-27 18:52:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 18:52:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:38,958 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:52:38,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:52:38,959 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1471653639, now seen corresponding path program 1 times [2020-10-27 18:52:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:38,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595602384] [2020-10-27 18:52:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:41,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:41,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 18:52:41,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:52:41,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 18:52:41,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:52:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:52:41,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 18:52:41,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:41,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:41,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:52:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:41,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:41,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:41,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:41,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:52:41,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:41,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 18:52:41,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:52:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:52:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:52:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:52:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595602384] [2020-10-27 18:52:42,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:42,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:52:42,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572501800] [2020-10-27 18:52:42,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:52:42,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:42,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:52:42,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:52:42,059 INFO L87 Difference]: Start difference. First operand 1876 states and 2567 transitions. Second operand 8 states. [2020-10-27 18:52:42,980 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-27 18:52:44,086 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-27 18:53:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:00,169 INFO L93 Difference]: Finished difference Result 4292 states and 5848 transitions. [2020-10-27 18:53:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:53:00,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2020-10-27 18:53:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:00,190 INFO L225 Difference]: With dead ends: 4292 [2020-10-27 18:53:00,190 INFO L226 Difference]: Without dead ends: 2346 [2020-10-27 18:53:00,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:53:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-10-27 18:53:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2328. [2020-10-27 18:53:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2328 states. [2020-10-27 18:53:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 3077 transitions. [2020-10-27 18:53:00,291 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 3077 transitions. Word has length 136 [2020-10-27 18:53:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:00,291 INFO L481 AbstractCegarLoop]: Abstraction has 2328 states and 3077 transitions. [2020-10-27 18:53:00,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:53:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 3077 transitions. [2020-10-27 18:53:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 18:53:00,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:00,294 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:53:00,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:53:00,295 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:00,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1208822886, now seen corresponding path program 1 times [2020-10-27 18:53:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:00,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107548389] [2020-10-27 18:53:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:00,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:00,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 18:53:00,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-27 18:53:00,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:00,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:00,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:53:00,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:53:00,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 18:53:00,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:00,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:00,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:00,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:00,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:00,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:53:00,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:00,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:00,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:00,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:00,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:01,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:01,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:01,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:53:01,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:01,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 18:53:01,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:01,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:53:01,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107548389] [2020-10-27 18:53:01,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:01,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854889166] [2020-10-27 18:53:01,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:01,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:01,198 INFO L87 Difference]: Start difference. First operand 2328 states and 3077 transitions. Second operand 5 states. [2020-10-27 18:53:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:18,004 INFO L93 Difference]: Finished difference Result 5538 states and 7601 transitions. [2020-10-27 18:53:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:18,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-10-27 18:53:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:18,036 INFO L225 Difference]: With dead ends: 5538 [2020-10-27 18:53:18,036 INFO L226 Difference]: Without dead ends: 4540 [2020-10-27 18:53:18,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2020-10-27 18:53:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3667. [2020-10-27 18:53:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3667 states. [2020-10-27 18:53:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 4983 transitions. [2020-10-27 18:53:18,218 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 4983 transitions. Word has length 149 [2020-10-27 18:53:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:18,219 INFO L481 AbstractCegarLoop]: Abstraction has 3667 states and 4983 transitions. [2020-10-27 18:53:18,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 4983 transitions. [2020-10-27 18:53:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 18:53:18,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:18,223 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:53:18,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:53:18,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash -308335738, now seen corresponding path program 1 times [2020-10-27 18:53:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:18,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094596598] [2020-10-27 18:53:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:19,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:19,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-27 18:53:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:53:19,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:19,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:19,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:19,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:19,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:19,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:19,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:53:19,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:19,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:19,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:19,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:19,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:20,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:20,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:20,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:53:20,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:20,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 18:53:20,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:53:20,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:53:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:53:20,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094596598] [2020-10-27 18:53:20,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:20,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:20,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159239311] [2020-10-27 18:53:20,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:20,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:20,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:20,306 INFO L87 Difference]: Start difference. First operand 3667 states and 4983 transitions. Second operand 5 states. [2020-10-27 18:53:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:53:43,396 INFO L93 Difference]: Finished difference Result 6476 states and 9680 transitions. [2020-10-27 18:53:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:53:43,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-27 18:53:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:53:43,437 INFO L225 Difference]: With dead ends: 6476 [2020-10-27 18:53:43,439 INFO L226 Difference]: Without dead ends: 5018 [2020-10-27 18:53:43,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:53:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2020-10-27 18:53:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5009. [2020-10-27 18:53:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5009 states. [2020-10-27 18:53:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 6886 transitions. [2020-10-27 18:53:43,609 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 6886 transitions. Word has length 159 [2020-10-27 18:53:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:53:43,611 INFO L481 AbstractCegarLoop]: Abstraction has 5009 states and 6886 transitions. [2020-10-27 18:53:43,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:53:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 6886 transitions. [2020-10-27 18:53:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 18:53:43,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:53:43,619 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, 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, 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] [2020-10-27 18:53:43,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:53:43,619 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:53:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:53:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1177883909, now seen corresponding path program 1 times [2020-10-27 18:53:43,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:53:43,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072362083] [2020-10-27 18:53:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:53:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:43,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:43,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:48,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:48,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 18:53:48,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:53:48,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 18:53:48,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:48,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:53:48,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-10-27 18:53:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 18:53:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:53:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:48,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:48,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:53:48,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:53:48,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:48,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:49,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:53:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:49,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:49,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:53:49,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:49,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:53:49,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:49,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:53:49,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:49,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:53:49,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:49,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-27 18:53:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:53:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:53:49,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:53:49,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 18:53:49,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:53:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 18:53:49,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:53:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:53:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:53:49,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 18:53:49,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:53:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 18:53:49,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072362083] [2020-10-27 18:53:49,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:53:49,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:53:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782689304] [2020-10-27 18:53:49,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:53:49,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:53:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:53:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:53:49,329 INFO L87 Difference]: Start difference. First operand 5009 states and 6886 transitions. Second operand 5 states. [2020-10-27 18:53:51,015 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 18:54:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:03,117 INFO L93 Difference]: Finished difference Result 7835 states and 11131 transitions. [2020-10-27 18:54:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:03,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2020-10-27 18:54:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:03,147 INFO L225 Difference]: With dead ends: 7835 [2020-10-27 18:54:03,147 INFO L226 Difference]: Without dead ends: 5009 [2020-10-27 18:54:03,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2020-10-27 18:54:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 5009. [2020-10-27 18:54:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5009 states. [2020-10-27 18:54:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 6883 transitions. [2020-10-27 18:54:03,319 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 6883 transitions. Word has length 215 [2020-10-27 18:54:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:03,320 INFO L481 AbstractCegarLoop]: Abstraction has 5009 states and 6883 transitions. [2020-10-27 18:54:03,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 6883 transitions. [2020-10-27 18:54:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 18:54:03,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:03,326 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:54:03,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:54:03,326 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:03,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1496827304, now seen corresponding path program 1 times [2020-10-27 18:54:03,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:03,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751486581] [2020-10-27 18:54:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:04,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:04,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 18:54:04,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1434 [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-27 18:54:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:05,027 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:54:05,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:05,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:05,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:05,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:05,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:54:05,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:54:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:54:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:05,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:05,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 18:54:05,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:05,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-27 18:54:05,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:54:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-27 18:54:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:54:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:54:05,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751486581] [2020-10-27 18:54:05,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:54:05,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 18:54:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086516990] [2020-10-27 18:54:05,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:54:05,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:54:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:54:05,819 INFO L87 Difference]: Start difference. First operand 5009 states and 6883 transitions. Second operand 7 states. [2020-10-27 18:54:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:29,393 INFO L93 Difference]: Finished difference Result 9660 states and 13927 transitions. [2020-10-27 18:54:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:54:29,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-10-27 18:54:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:29,440 INFO L225 Difference]: With dead ends: 9660 [2020-10-27 18:54:29,440 INFO L226 Difference]: Without dead ends: 5090 [2020-10-27 18:54:29,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:54:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2020-10-27 18:54:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 5021. [2020-10-27 18:54:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5021 states. [2020-10-27 18:54:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 6518 transitions. [2020-10-27 18:54:29,638 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 6518 transitions. Word has length 217 [2020-10-27 18:54:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:29,638 INFO L481 AbstractCegarLoop]: Abstraction has 5021 states and 6518 transitions. [2020-10-27 18:54:29,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:54:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 6518 transitions. [2020-10-27 18:54:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 18:54:29,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:29,644 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, 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, 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] [2020-10-27 18:54:29,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:54:29,644 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2080737554, now seen corresponding path program 1 times [2020-10-27 18:54:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:29,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680093827] [2020-10-27 18:54:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:29,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:34,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:34,896 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:54:34,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:34,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:34,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:34,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:34,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 18:54:34,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:54:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:35,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:54:35,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 18:54:35,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:35,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:35,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:54:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:35,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:35,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:54:35,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:35,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 18:54:35,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:54:35,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:54:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680093827] [2020-10-27 18:54:35,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:35,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:35,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516009310] [2020-10-27 18:54:35,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:35,309 INFO L87 Difference]: Start difference. First operand 5021 states and 6518 transitions. Second operand 5 states. [2020-10-27 18:54:35,449 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:54:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:54:54,534 INFO L93 Difference]: Finished difference Result 13202 states and 17303 transitions. [2020-10-27 18:54:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:54:54,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-27 18:54:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:54:54,578 INFO L225 Difference]: With dead ends: 13202 [2020-10-27 18:54:54,578 INFO L226 Difference]: Without dead ends: 8620 [2020-10-27 18:54:54,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:54:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2020-10-27 18:54:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 7720. [2020-10-27 18:54:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7720 states. [2020-10-27 18:54:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7720 states to 7720 states and 10137 transitions. [2020-10-27 18:54:54,844 INFO L78 Accepts]: Start accepts. Automaton has 7720 states and 10137 transitions. Word has length 224 [2020-10-27 18:54:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:54:54,845 INFO L481 AbstractCegarLoop]: Abstraction has 7720 states and 10137 transitions. [2020-10-27 18:54:54,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:54:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7720 states and 10137 transitions. [2020-10-27 18:54:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-27 18:54:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:54:54,851 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, 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, 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] [2020-10-27 18:54:54,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:54:54,852 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:54:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:54:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1333270602, now seen corresponding path program 1 times [2020-10-27 18:54:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:54:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080953602] [2020-10-27 18:54:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:54:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:54,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:55,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:56,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:56,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 18:54:56,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:54:56,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-27 18:54:56,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:56,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:54:56,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-27 18:54:56,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:54:56,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:56,764 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:54:56,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:54:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:56,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:56,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:56,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:54:56,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:56,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:54:56,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:56,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:56,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:56,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:54:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:56,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:54:56,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:56,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:54:56,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:56,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:54:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:54:56,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:54:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:54:57,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:54:57,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:54:57,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 18:54:57,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:54:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:54:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:54:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:54:57,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:54:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 18:54:57,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080953602] [2020-10-27 18:54:57,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:54:57,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:54:57,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326583789] [2020-10-27 18:54:57,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:54:57,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:54:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:54:57,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:54:57,255 INFO L87 Difference]: Start difference. First operand 7720 states and 10137 transitions. Second operand 5 states. [2020-10-27 18:54:58,988 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 18:55:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:55:13,617 INFO L93 Difference]: Finished difference Result 15048 states and 19887 transitions. [2020-10-27 18:55:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:55:13,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2020-10-27 18:55:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:55:13,662 INFO L225 Difference]: With dead ends: 15048 [2020-10-27 18:55:13,662 INFO L226 Difference]: Without dead ends: 7720 [2020-10-27 18:55:13,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:55:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2020-10-27 18:55:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 7720. [2020-10-27 18:55:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7720 states. [2020-10-27 18:55:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7720 states to 7720 states and 10131 transitions. [2020-10-27 18:55:13,913 INFO L78 Accepts]: Start accepts. Automaton has 7720 states and 10131 transitions. Word has length 228 [2020-10-27 18:55:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:55:13,915 INFO L481 AbstractCegarLoop]: Abstraction has 7720 states and 10131 transitions. [2020-10-27 18:55:13,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:55:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7720 states and 10131 transitions. [2020-10-27 18:55:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-27 18:55:13,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:55:13,922 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, 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, 2, 2, 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] [2020-10-27 18:55:13,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:55:13,923 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:55:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:55:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2020326526, now seen corresponding path program 1 times [2020-10-27 18:55:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:55:13,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436528870] [2020-10-27 18:55:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:55:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:14,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:14,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:14,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:55:14,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:14,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-27 18:55:14,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:55:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 18:55:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:14,739 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:55:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:55:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:14,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:14,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:14,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:55:14,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:55:14,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:14,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:55:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:14,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:14,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:15,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:55:15,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 18:55:15,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:55:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:55:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:15,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:55:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:15,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:15,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:15,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:55:15,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:15,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 18:55:15,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:55:15,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 18:55:15,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:55:15,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436528870] [2020-10-27 18:55:15,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:55:15,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:55:15,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55295717] [2020-10-27 18:55:15,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:55:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:55:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:55:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:55:15,397 INFO L87 Difference]: Start difference. First operand 7720 states and 10131 transitions. Second operand 7 states. [2020-10-27 18:55:15,552 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:55:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:55:36,614 INFO L93 Difference]: Finished difference Result 18588 states and 25447 transitions. [2020-10-27 18:55:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:55:36,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-27 18:55:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:55:36,660 INFO L225 Difference]: With dead ends: 18588 [2020-10-27 18:55:36,660 INFO L226 Difference]: Without dead ends: 11307 [2020-10-27 18:55:36,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:55:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11307 states. [2020-10-27 18:55:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11307 to 10417. [2020-10-27 18:55:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10417 states. [2020-10-27 18:55:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 13966 transitions. [2020-10-27 18:55:37,023 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 13966 transitions. Word has length 234 [2020-10-27 18:55:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:55:37,023 INFO L481 AbstractCegarLoop]: Abstraction has 10417 states and 13966 transitions. [2020-10-27 18:55:37,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:55:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 13966 transitions. [2020-10-27 18:55:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-27 18:55:37,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:55:37,028 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, 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, 2, 2, 2, 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] [2020-10-27 18:55:37,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:55:37,029 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:55:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:55:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1747965640, now seen corresponding path program 1 times [2020-10-27 18:55:37,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:55:37,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146402804] [2020-10-27 18:55:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:55:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:37,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:42,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:42,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 18:55:42,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:55:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 18:55:42,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:55:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:55:42,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 18:55:42,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:42,305 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:55:42,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:55:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:42,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:42,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:55:42,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:55:42,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:42,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:55:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:42,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:42,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:55:42,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:42,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:55:42,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:42,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:55:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:42,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:55:42,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:55:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:55:42,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:55:42,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:55:42,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:55:42,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:55:42,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 18:55:42,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:55:42,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:55:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:55:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:55:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:55:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:55:42,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146402804] [2020-10-27 18:55:42,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:55:42,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:55:42,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91668445] [2020-10-27 18:55:42,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:55:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:55:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:55:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:55:42,652 INFO L87 Difference]: Start difference. First operand 10417 states and 13966 transitions. Second operand 5 states. [2020-10-27 18:55:42,814 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68