/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:10:10,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:10:10,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:10:10,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:10:10,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:10:10,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:10:10,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:10:10,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:10:10,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:10:10,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:10:10,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:10:10,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:10:10,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:10:10,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:10:10,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:10:10,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:10:10,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:10:10,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:10:10,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:10:10,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:10:10,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:10:10,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:10:10,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:10:10,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:10:10,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:10:10,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:10:10,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:10:10,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:10:10,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:10:10,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:10:10,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:10:10,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:10:10,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:10:10,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:10:10,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:10:10,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:10:10,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:10:10,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:10:10,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:10:10,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:10:10,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:10:10,572 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 [2020-10-29 07:10:10,631 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:10:10,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:10:10,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:10:10,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:10:10,639 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:10:10,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:10:10,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:10:10,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:10:10,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:10:10,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:10:10,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:10:10,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:10:10,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:10:10,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:10:10,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:10:10,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:10:10,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:10:10,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:10:10,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:10:10,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:10:10,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:10:10,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:10:10,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:10:10,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:10:10,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:10:10,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:10:10,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:10:10,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:10:10,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:10:10,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:10:11,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:10:11,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:10:11,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:10:11,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:10:11,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:10:11,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-29 07:10:11,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33bf07abf/5d10674b76ec4cafa30e7a8c1b83463c/FLAG802633e40 [2020-10-29 07:10:12,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:10:12,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label06.c [2020-10-29 07:10:12,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33bf07abf/5d10674b76ec4cafa30e7a8c1b83463c/FLAG802633e40 [2020-10-29 07:10:13,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33bf07abf/5d10674b76ec4cafa30e7a8c1b83463c [2020-10-29 07:10:13,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:10:13,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:10:13,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:10:13,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:10:13,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:10:13,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:10:13" (1/1) ... [2020-10-29 07:10:13,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e29b22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:13, skipping insertion in model container [2020-10-29 07:10:13,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:10:13" (1/1) ... [2020-10-29 07:10:13,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:10:13,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:10:14,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:10:14,958 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:10:15,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:10:15,800 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:10:15,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15 WrapperNode [2020-10-29 07:10:15,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:10:15,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:10:15,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:10:15,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:10:15,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:15,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:15,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:15,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:16,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:16,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:16,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (1/1) ... [2020-10-29 07:10:16,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:10:16,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:10:16,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:10:16,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:10:16,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (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 [2020-10-29 07:10:16,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:10:16,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:10:16,395 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:10:16,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:10:16,396 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:10:16,396 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:10:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:10:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:10:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:10:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:10:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:10:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:10:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:10:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:10:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:10:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:10:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:10:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:10:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:10:26,891 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:10:26,891 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:10:26,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:10:26 BoogieIcfgContainer [2020-10-29 07:10:26,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:10:26,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:10:26,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:10:26,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:10:26,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:10:13" (1/3) ... [2020-10-29 07:10:26,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50887367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:10:26, skipping insertion in model container [2020-10-29 07:10:26,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:10:15" (2/3) ... [2020-10-29 07:10:26,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50887367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:10:26, skipping insertion in model container [2020-10-29 07:10:26,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:10:26" (3/3) ... [2020-10-29 07:10:26,919 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label06.c [2020-10-29 07:10:26,935 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:10:26,943 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:10:26,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:10:27,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:10:27,020 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:10:27,021 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:10:27,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:10:27,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:10:27,021 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:10:27,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:10:27,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:10:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:10:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 07:10:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:10:27,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:10:27,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:10:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:10:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash -452148062, now seen corresponding path program 1 times [2020-10-29 07:10:27,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:10:27,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520598088] [2020-10-29 07:10:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:10:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:28,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 07:10:28,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:28,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-29 07:10:28,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:28,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:10:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:10:28,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 07:10:28,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:10:28,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:10:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:28,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:28,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:28,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:10:28,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:28,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 07:10:28,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:28,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:10:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:10:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:10:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:10:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:10:28,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520598088] [2020-10-29 07:10:28,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:10:28,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:10:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811371413] [2020-10-29 07:10:28,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:10:28,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:10:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:10:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:10:28,473 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:10:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:10:47,791 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-29 07:10:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:10:47,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 07:10:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:10:47,848 INFO L225 Difference]: With dead ends: 3157 [2020-10-29 07:10:47,848 INFO L226 Difference]: Without dead ends: 1955 [2020-10-29 07:10:47,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:10:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-29 07:10:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-29 07:10:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-29 07:10:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-29 07:10:48,053 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 32 [2020-10-29 07:10:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:10:48,054 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-29 07:10:48,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:10:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-29 07:10:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 07:10:48,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:10:48,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:10:48,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:10:48,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:10:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:10:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 922615984, now seen corresponding path program 1 times [2020-10-29 07:10:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:10:48,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594630320] [2020-10-29 07:10:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:10:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:49,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 07:10:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:10:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1756 [2020-10-29 07:10:49,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:49,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:49,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:10:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:10:49,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:10:49,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:10:50,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:10:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:50,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:50,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:10:50,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:50,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 07:10:50,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:50,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:50,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:10:50,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:10:50,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:10:50,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 07:10:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:10:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:10:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:10:50,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:10:50,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 07:10:50,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:10:50,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-29 07:10:50,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:10:50,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:10:50,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:10:50,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:10:50,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 07:10:50,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:10:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:10:50,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594630320] [2020-10-29 07:10:50,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:10:50,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:10:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933105442] [2020-10-29 07:10:50,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:10:50,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:10:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:10:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:10:50,356 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 7 states. [2020-10-29 07:11:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:11:15,743 INFO L93 Difference]: Finished difference Result 5676 states and 9342 transitions. [2020-10-29 07:11:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:11:15,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-29 07:11:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:11:15,772 INFO L225 Difference]: With dead ends: 5676 [2020-10-29 07:11:15,773 INFO L226 Difference]: Without dead ends: 3796 [2020-10-29 07:11:15,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:11:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2020-10-29 07:11:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3699. [2020-10-29 07:11:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3699 states. [2020-10-29 07:11:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5552 transitions. [2020-10-29 07:11:15,933 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5552 transitions. Word has length 102 [2020-10-29 07:11:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:11:15,934 INFO L481 AbstractCegarLoop]: Abstraction has 3699 states and 5552 transitions. [2020-10-29 07:11:15,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:11:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5552 transitions. [2020-10-29 07:11:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 07:11:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:11:15,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:11:15,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:11:15,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:11:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:11:15,939 INFO L82 PathProgramCache]: Analyzing trace with hash 291905914, now seen corresponding path program 1 times [2020-10-29 07:11:15,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:11:15,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197527323] [2020-10-29 07:11:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:11:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:16,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:16,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:16,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 07:11:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:11:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-29 07:11:16,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:16,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:11:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:11:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 07:11:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:11:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:17,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:17,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:11:17,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:17,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 07:11:17,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:17,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:11:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:17,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:11:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:17,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:11:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:17,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 07:11:17,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:11:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:11:17,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197527323] [2020-10-29 07:11:17,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:11:17,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:11:17,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158737798] [2020-10-29 07:11:17,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:11:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:11:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:11:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:11:17,557 INFO L87 Difference]: Start difference. First operand 3699 states and 5552 transitions. Second operand 7 states. [2020-10-29 07:11:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:11:46,890 INFO L93 Difference]: Finished difference Result 11024 states and 16806 transitions. [2020-10-29 07:11:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:11:46,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-29 07:11:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:11:46,940 INFO L225 Difference]: With dead ends: 11024 [2020-10-29 07:11:46,940 INFO L226 Difference]: Without dead ends: 7331 [2020-10-29 07:11:46,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:11:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2020-10-29 07:11:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 7129. [2020-10-29 07:11:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7129 states. [2020-10-29 07:11:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7129 states to 7129 states and 9937 transitions. [2020-10-29 07:11:47,205 INFO L78 Accepts]: Start accepts. Automaton has 7129 states and 9937 transitions. Word has length 107 [2020-10-29 07:11:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:11:47,211 INFO L481 AbstractCegarLoop]: Abstraction has 7129 states and 9937 transitions. [2020-10-29 07:11:47,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:11:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 7129 states and 9937 transitions. [2020-10-29 07:11:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 07:11:47,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:11:47,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:11:47,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:11:47,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:11:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:11:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1182274774, now seen corresponding path program 1 times [2020-10-29 07:11:47,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:11:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145656069] [2020-10-29 07:11:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:11:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:49,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-29 07:11:49,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:11:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-29 07:11:49,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:49,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:11:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:11:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-29 07:11:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:11:49,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:11:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:49,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:49,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:11:49,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:49,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 07:11:49,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:49,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:11:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:11:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:11:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:11:49,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:11:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:11:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:11:49,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:11:49,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 07:11:49,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:11:49,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-29 07:11:49,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:11:49,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:11:49,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:11:49,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:11:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-29 07:11:49,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:11:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:11:50,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145656069] [2020-10-29 07:11:50,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:11:50,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:11:50,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450492295] [2020-10-29 07:11:50,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:11:50,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:11:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:11:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:11:50,008 INFO L87 Difference]: Start difference. First operand 7129 states and 9937 transitions. Second operand 7 states. [2020-10-29 07:11:51,265 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 07:12:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:12:18,726 INFO L93 Difference]: Finished difference Result 12100 states and 16964 transitions. [2020-10-29 07:12:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:12:18,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-29 07:12:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:12:18,756 INFO L225 Difference]: With dead ends: 12100 [2020-10-29 07:12:18,756 INFO L226 Difference]: Without dead ends: 4977 [2020-10-29 07:12:18,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:12:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2020-10-29 07:12:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4665. [2020-10-29 07:12:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4665 states. [2020-10-29 07:12:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 6568 transitions. [2020-10-29 07:12:18,917 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 6568 transitions. Word has length 147 [2020-10-29 07:12:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:12:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 4665 states and 6568 transitions. [2020-10-29 07:12:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:12:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 6568 transitions. [2020-10-29 07:12:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-29 07:12:18,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:12:18,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:12:18,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:12:18,925 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:12:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:12:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1644890105, now seen corresponding path program 1 times [2020-10-29 07:12:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:12:18,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977789560] [2020-10-29 07:12:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:12:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:19,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:19,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:19,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-29 07:12:19,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:12:19,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-29 07:12:19,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:19,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:12:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:12:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-29 07:12:19,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:12:20,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:12:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:20,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:20,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:12:20,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:20,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 07:12:20,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:20,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:20,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:12:20,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:12:20,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:12:20,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:20,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:12:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:20,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:20,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:20,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:12:20,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:12:20,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-29 07:12:20,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:20,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:12:20,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:12:20,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:12:20,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 07:12:20,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977789560] [2020-10-29 07:12:20,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:12:20,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:12:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952147479] [2020-10-29 07:12:20,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:12:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:12:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:12:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:12:20,613 INFO L87 Difference]: Start difference. First operand 4665 states and 6568 transitions. Second operand 5 states. [2020-10-29 07:12:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:12:41,603 INFO L93 Difference]: Finished difference Result 11989 states and 17888 transitions. [2020-10-29 07:12:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:12:41,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-29 07:12:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:12:41,662 INFO L225 Difference]: With dead ends: 11989 [2020-10-29 07:12:41,662 INFO L226 Difference]: Without dead ends: 8133 [2020-10-29 07:12:41,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:12:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2020-10-29 07:12:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 8108. [2020-10-29 07:12:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8108 states. [2020-10-29 07:12:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8108 states to 8108 states and 10699 transitions. [2020-10-29 07:12:41,915 INFO L78 Accepts]: Start accepts. Automaton has 8108 states and 10699 transitions. Word has length 161 [2020-10-29 07:12:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:12:41,916 INFO L481 AbstractCegarLoop]: Abstraction has 8108 states and 10699 transitions. [2020-10-29 07:12:41,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:12:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8108 states and 10699 transitions. [2020-10-29 07:12:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-29 07:12:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:12:41,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:12:41,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:12:41,921 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:12:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:12:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 464336481, now seen corresponding path program 1 times [2020-10-29 07:12:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:12:41,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119877880] [2020-10-29 07:12:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:12:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:42,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:42,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:44,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:44,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-29 07:12:44,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:12:44,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2558 [2020-10-29 07:12:44,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:44,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:12:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:12:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-29 07:12:44,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:12:44,734 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:12:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:12:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:44,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:44,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:44,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:12:44,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:44,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 07:12:44,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:44,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:44,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:12:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:12:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:12:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:12:44,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:12:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:44,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:45,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:12:45,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:45,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-29 07:12:45,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:45,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:12:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:12:45,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 07:12:45,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:45,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:12:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:12:45,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:12:45,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:12:45,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 07:12:45,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:12:45,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-29 07:12:45,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:12:45,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:12:45,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:12:45,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:12:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 07:12:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:12:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 49 proven. 84 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 07:12:45,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119877880] [2020-10-29 07:12:45,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:12:45,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:12:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96798421] [2020-10-29 07:12:45,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:12:45,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:12:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:12:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:12:45,574 INFO L87 Difference]: Start difference. First operand 8108 states and 10699 transitions. Second operand 8 states. [2020-10-29 07:13:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:13:12,325 INFO L93 Difference]: Finished difference Result 18304 states and 24593 transitions. [2020-10-29 07:13:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:13:12,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 221 [2020-10-29 07:13:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:13:12,371 INFO L225 Difference]: With dead ends: 18304 [2020-10-29 07:13:12,371 INFO L226 Difference]: Without dead ends: 11005 [2020-10-29 07:13:12,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:13:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2020-10-29 07:13:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 10818. [2020-10-29 07:13:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10818 states. [2020-10-29 07:13:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10818 states to 10818 states and 13965 transitions. [2020-10-29 07:13:12,668 INFO L78 Accepts]: Start accepts. Automaton has 10818 states and 13965 transitions. Word has length 221 [2020-10-29 07:13:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:13:12,669 INFO L481 AbstractCegarLoop]: Abstraction has 10818 states and 13965 transitions. [2020-10-29 07:13:12,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 07:13:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 10818 states and 13965 transitions. [2020-10-29 07:13:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-29 07:13:12,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:13:12,674 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:13:12,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:13:12,675 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:13:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:13:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 293471490, now seen corresponding path program 1 times [2020-10-29 07:13:12,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:13:12,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434640699] [2020-10-29 07:13:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:13:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:16,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:16,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-29 07:13:16,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:13:16,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3640 [2020-10-29 07:13:16,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:16,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 07:13:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:13:16,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-29 07:13:16,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:16,599 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:13:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:13:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:16,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:16,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:16,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:13:16,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:13:16,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:13:16,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:16,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:13:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:16,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:17,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:17,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:13:17,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:13:17,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-29 07:13:17,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:17,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:17,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:13:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:13:17,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:13:17,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:13:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-29 07:13:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:17,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:17,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 07:13:17,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:13:17,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-29 07:13:17,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:17,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 07:13:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 07:13:17,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434640699] [2020-10-29 07:13:17,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:13:17,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:13:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575753144] [2020-10-29 07:13:17,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:13:17,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:13:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:13:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:13:17,437 INFO L87 Difference]: Start difference. First operand 10818 states and 13965 transitions. Second operand 7 states. [2020-10-29 07:13:17,633 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:13:21,172 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:13:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:13:48,500 INFO L93 Difference]: Finished difference Result 29877 states and 40957 transitions. [2020-10-29 07:13:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:13:48,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-10-29 07:13:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:13:48,592 INFO L225 Difference]: With dead ends: 29877 [2020-10-29 07:13:48,592 INFO L226 Difference]: Without dead ends: 19868 [2020-10-29 07:13:48,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:13:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19868 states. [2020-10-29 07:13:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19868 to 19632. [2020-10-29 07:13:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19632 states. [2020-10-29 07:13:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19632 states to 19632 states and 24504 transitions. [2020-10-29 07:13:49,167 INFO L78 Accepts]: Start accepts. Automaton has 19632 states and 24504 transitions. Word has length 237 [2020-10-29 07:13:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:13:49,168 INFO L481 AbstractCegarLoop]: Abstraction has 19632 states and 24504 transitions. [2020-10-29 07:13:49,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:13:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 19632 states and 24504 transitions. [2020-10-29 07:13:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-29 07:13:49,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:13:49,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:13:49,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:13:49,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:13:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:13:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -990286435, now seen corresponding path program 1 times [2020-10-29 07:13:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:13:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791904698] [2020-10-29 07:13:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:13:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:49,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:49,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:50,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:50,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-29 07:13:50,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:13:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-29 07:13:50,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:50,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:13:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-29 07:13:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 07:13:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:51,057 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:13:51,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:13:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:51,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:51,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:13:51,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:13:51,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 07:13:51,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:51,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:13:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:13:51,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:13:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:13:51,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:13:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:51,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:51,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:51,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:13:51,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:13:51,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 07:13:51,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:51,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:13:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:13:51,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:13:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:13:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:13:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:13:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:13:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 07:13:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:13:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-29 07:13:51,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:13:51,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:13:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:13:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:13:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 07:13:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:13:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:13:51,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791904698] [2020-10-29 07:13:51,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:13:51,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 07:13:51,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079884273] [2020-10-29 07:13:51,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 07:13:51,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:13:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 07:13:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 07:13:51,983 INFO L87 Difference]: Start difference. First operand 19632 states and 24504 transitions. Second operand 8 states. [2020-10-29 07:13:52,197 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:13:56,396 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 07:13:57,098 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67