/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/Problem17_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:15:48,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:15:48,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:15:48,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:15:48,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:15:48,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:15:48,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:15:48,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:15:48,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:15:48,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:15:48,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:15:48,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:15:48,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:15:48,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:15:48,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:15:48,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:15:48,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:15:48,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:15:48,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:15:48,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:15:48,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:15:48,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:15:48,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:15:48,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:15:48,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:15:48,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:15:48,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:15:48,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:15:48,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:15:48,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:15:48,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:15:48,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:15:48,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:15:48,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:15:48,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:15:48,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:15:48,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:15:48,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:15:48,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:15:48,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:15:48,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:15:48,646 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 08:15:48,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:15:48,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:15:48,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:15:48,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:15:48,700 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:15:48,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:15:48,701 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:15:48,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:15:48,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:15:48,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:15:48,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:15:48,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:15:48,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:15:48,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:15:48,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:15:48,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:15:48,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:15:48,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:15:48,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:15:48,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:15:48,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:15:48,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:15:48,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:15:48,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:15:48,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:15:48,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:15:48,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:15:48,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:15:48,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:15:48,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:15:49,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:15:49,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:15:49,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:15:49,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:15:49,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:15:49,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2020-10-29 08:15:49,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fd7de126/5d12e146fb7e44339648a33dbe399a34/FLAGb0a971060 [2020-10-29 08:15:50,658 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:15:50,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2020-10-29 08:15:50,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fd7de126/5d12e146fb7e44339648a33dbe399a34/FLAGb0a971060 [2020-10-29 08:15:51,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fd7de126/5d12e146fb7e44339648a33dbe399a34 [2020-10-29 08:15:51,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:15:51,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:15:51,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:15:51,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:15:51,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:15:51,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:15:51" (1/1) ... [2020-10-29 08:15:51,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b560c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:51, skipping insertion in model container [2020-10-29 08:15:51,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:15:51" (1/1) ... [2020-10-29 08:15:51,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:15:51,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:15:52,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:15:52,341 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:15:52,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:15:52,898 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:15:52,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52 WrapperNode [2020-10-29 08:15:52,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:15:52,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:15:52,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:15:52,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:15:52,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:52,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (1/1) ... [2020-10-29 08:15:53,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:15:53,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:15:53,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:15:53,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:15:53,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (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 08:15:53,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:15:53,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:15:53,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:15:53,470 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:15:53,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:15:53,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:15:53,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:15:53,472 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:15:53,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:15:53,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:15:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:15:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:15:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:15:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:15:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:15:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:15:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:15:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:15:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:15:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:15:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:16:03,395 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:16:03,396 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:16:03,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:16:03 BoogieIcfgContainer [2020-10-29 08:16:03,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:16:03,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:16:03,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:16:03,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:16:03,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:15:51" (1/3) ... [2020-10-29 08:16:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d892c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:16:03, skipping insertion in model container [2020-10-29 08:16:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:15:52" (2/3) ... [2020-10-29 08:16:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d892c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:16:03, skipping insertion in model container [2020-10-29 08:16:03,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:16:03" (3/3) ... [2020-10-29 08:16:03,421 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2020-10-29 08:16:03,437 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:16:03,446 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:16:03,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:16:03,521 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:16:03,522 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:16:03,522 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:16:03,522 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:16:03,522 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:16:03,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:16:03,522 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:16:03,523 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:16:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:16:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 08:16:03,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:16:03,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:16:03,597 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:16:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:16:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 10153866, now seen corresponding path program 1 times [2020-10-29 08:16:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:16:03,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372389168] [2020-10-29 08:16:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:16:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:04,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:04,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:04,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:16:04,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-29 08:16:04,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:04,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:04,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:16:04,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:16:04,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 08:16:04,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:16:04,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:16:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:05,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:05,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:05,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:16:05,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:05,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 08:16:05,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:05,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:16:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:16:05,094 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 08:16:05,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372389168] [2020-10-29 08:16:05,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:16:05,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:16:05,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833842451] [2020-10-29 08:16:05,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:16:05,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:16:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:16:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:16:05,138 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:16:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:16:20,844 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-29 08:16:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:16:20,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-29 08:16:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:16:20,893 INFO L225 Difference]: With dead ends: 1697 [2020-10-29 08:16:20,894 INFO L226 Difference]: Without dead ends: 1013 [2020-10-29 08:16:20,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:16:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-29 08:16:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-29 08:16:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-29 08:16:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-29 08:16:21,113 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 66 [2020-10-29 08:16:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:16:21,114 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-29 08:16:21,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:16:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-29 08:16:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 08:16:21,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:16:21,122 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, 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] [2020-10-29 08:16:21,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:16:21,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:16:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:16:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1347411382, now seen corresponding path program 1 times [2020-10-29 08:16:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:16:21,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780401976] [2020-10-29 08:16:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:16:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:21,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:21,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:24,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:24,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-29 08:16:24,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:16:24,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3295 [2020-10-29 08:16:24,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:24,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:16:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:16:24,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-29 08:16:24,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:16:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:16:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:24,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:24,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:24,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:16:24,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:24,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 08:16:24,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:24,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:24,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:16:24,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:16:24,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:16:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:25,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:25,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:16:25,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:16:25,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-29 08:16:25,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:25,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:25,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:16:25,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:16:25,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:16:25,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:16:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:16:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780401976] [2020-10-29 08:16:25,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:16:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:16:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116010740] [2020-10-29 08:16:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:16:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:16:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:16:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:16:25,349 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-29 08:16:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:16:42,945 INFO L93 Difference]: Finished difference Result 2966 states and 4582 transitions. [2020-10-29 08:16:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:16:42,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-29 08:16:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:16:42,964 INFO L225 Difference]: With dead ends: 2966 [2020-10-29 08:16:42,964 INFO L226 Difference]: Without dead ends: 1969 [2020-10-29 08:16:42,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:16:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2020-10-29 08:16:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1930. [2020-10-29 08:16:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-29 08:16:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2594 transitions. [2020-10-29 08:16:43,044 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2594 transitions. Word has length 137 [2020-10-29 08:16:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:16:43,044 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2594 transitions. [2020-10-29 08:16:43,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:16:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2594 transitions. [2020-10-29 08:16:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 08:16:43,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:16:43,048 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, 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] [2020-10-29 08:16:43,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:16:43,048 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:16:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:16:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1156110615, now seen corresponding path program 1 times [2020-10-29 08:16:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:16:43,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8491148] [2020-10-29 08:16:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:16:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:43,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:43,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-29 08:16:48,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:16:48,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 08:16:48,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:16:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:16:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 08:16:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:48,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:16:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:48,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:16:48,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:16:48,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:16:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:16:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:16:48,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:16:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:16:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:16:48,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:16:48,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:16:48,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:16:48,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:16:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 08:16:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:16:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:16:48,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8491148] [2020-10-29 08:16:48,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:16:48,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:16:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601375717] [2020-10-29 08:16:48,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 08:16:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:16:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 08:16:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:16:48,864 INFO L87 Difference]: Start difference. First operand 1930 states and 2594 transitions. Second operand 8 states. [2020-10-29 08:16:49,012 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:17:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:17:10,283 INFO L93 Difference]: Finished difference Result 5334 states and 7374 transitions. [2020-10-29 08:17:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 08:17:10,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-10-29 08:17:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:17:10,308 INFO L225 Difference]: With dead ends: 5334 [2020-10-29 08:17:10,308 INFO L226 Difference]: Without dead ends: 3361 [2020-10-29 08:17:10,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-29 08:17:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2020-10-29 08:17:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 3306. [2020-10-29 08:17:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3306 states. [2020-10-29 08:17:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 4399 transitions. [2020-10-29 08:17:10,426 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 4399 transitions. Word has length 140 [2020-10-29 08:17:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:17:10,427 INFO L481 AbstractCegarLoop]: Abstraction has 3306 states and 4399 transitions. [2020-10-29 08:17:10,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 08:17:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 4399 transitions. [2020-10-29 08:17:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-29 08:17:10,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:17:10,438 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:17:10,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:17:10,439 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:17:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:17:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1160285042, now seen corresponding path program 1 times [2020-10-29 08:17:10,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:17:10,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570519437] [2020-10-29 08:17:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:17:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:10,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:12,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:12,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-29 08:17:12,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:17:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1606 [2020-10-29 08:17:12,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:12,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:17:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:17:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-29 08:17:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:17:12,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:17:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:12,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:12,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:17:12,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:17:12,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:12,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:17:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:17:12,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:17:12,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:17:12,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:17:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:12,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:12,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:12,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:17:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 08:17:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:12,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:17:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:17:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:17:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:12,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:17:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:12,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:12,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:17:12,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:12,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-29 08:17:12,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:12,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:17:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:12,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 08:17:12,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:17:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 122 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 08:17:12,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570519437] [2020-10-29 08:17:12,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:17:12,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:17:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027801188] [2020-10-29 08:17:12,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:17:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:17:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:17:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:17:12,818 INFO L87 Difference]: Start difference. First operand 3306 states and 4399 transitions. Second operand 6 states. [2020-10-29 08:17:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:17:30,603 INFO L93 Difference]: Finished difference Result 7669 states and 10748 transitions. [2020-10-29 08:17:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:17:30,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 222 [2020-10-29 08:17:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:17:30,639 INFO L225 Difference]: With dead ends: 7669 [2020-10-29 08:17:30,640 INFO L226 Difference]: Without dead ends: 4802 [2020-10-29 08:17:30,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:17:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2020-10-29 08:17:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4753. [2020-10-29 08:17:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4753 states. [2020-10-29 08:17:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 6263 transitions. [2020-10-29 08:17:30,826 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 6263 transitions. Word has length 222 [2020-10-29 08:17:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:17:30,830 INFO L481 AbstractCegarLoop]: Abstraction has 4753 states and 6263 transitions. [2020-10-29 08:17:30,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:17:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 6263 transitions. [2020-10-29 08:17:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-29 08:17:30,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:17:30,836 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, 3, 3, 3, 3, 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] [2020-10-29 08:17:30,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:17:30,837 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:17:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:17:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2096433822, now seen corresponding path program 1 times [2020-10-29 08:17:30,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:17:30,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535765930] [2020-10-29 08:17:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:17:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:30,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:31,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:33,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:35,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:35,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-29 08:17:35,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:17:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 08:17:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:35,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:17:35,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:17:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:17:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:17:36,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:17:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:36,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:36,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:17:36,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:17:36,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:36,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:36,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:17:36,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:17:36,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:17:36,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:17:36,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:17:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:36,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:36,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:17:36,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 08:17:36,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:36,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:17:36,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:36,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:17:36,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:17:36,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:17:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:17:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:17:36,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:17:36,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:17:36,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:17:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:17:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:17:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:17:36,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535765930] [2020-10-29 08:17:36,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:17:36,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:17:36,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825994775] [2020-10-29 08:17:36,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:17:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:17:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:17:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:17:36,886 INFO L87 Difference]: Start difference. First operand 4753 states and 6263 transitions. Second operand 10 states. [2020-10-29 08:17:37,126 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 08:18:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:18:04,205 INFO L93 Difference]: Finished difference Result 11687 states and 16996 transitions. [2020-10-29 08:18:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 08:18:04,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 228 [2020-10-29 08:18:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:18:04,265 INFO L225 Difference]: With dead ends: 11687 [2020-10-29 08:18:04,266 INFO L226 Difference]: Without dead ends: 7373 [2020-10-29 08:18:04,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 08:18:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2020-10-29 08:18:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 7166. [2020-10-29 08:18:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7166 states. [2020-10-29 08:18:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7166 states to 7166 states and 9244 transitions. [2020-10-29 08:18:04,579 INFO L78 Accepts]: Start accepts. Automaton has 7166 states and 9244 transitions. Word has length 228 [2020-10-29 08:18:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:18:04,580 INFO L481 AbstractCegarLoop]: Abstraction has 7166 states and 9244 transitions. [2020-10-29 08:18:04,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:18:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7166 states and 9244 transitions. [2020-10-29 08:18:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-29 08:18:04,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:18:04,587 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:18:04,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:18:04,588 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:18:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:18:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash 187164696, now seen corresponding path program 1 times [2020-10-29 08:18:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:18:04,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55840533] [2020-10-29 08:18:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:18:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:04,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:09,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-29 08:18:09,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:18:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 08:18:09,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:09,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:09,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:18:09,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:18:09,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-29 08:18:09,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:09,943 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:18:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:18:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:09,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:09,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:09,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:18:09,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:18:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 08:18:09,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:09,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:18:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:18:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:18:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:10,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:18:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:10,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:10,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:10,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:18:10,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:18:10,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 08:18:10,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:10,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:18:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:18:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:18:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:10,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:18:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:10,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:10,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:18:10,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:18:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 08:18:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:10,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:18:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:18:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:18:10,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:18:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55840533] [2020-10-29 08:18:10,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:18:10,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:18:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594561262] [2020-10-29 08:18:10,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:18:10,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:18:10,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:18:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:18:10,711 INFO L87 Difference]: Start difference. First operand 7166 states and 9244 transitions. Second operand 6 states. [2020-10-29 08:18:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:18:26,692 INFO L93 Difference]: Finished difference Result 19316 states and 25864 transitions. [2020-10-29 08:18:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:18:26,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2020-10-29 08:18:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:18:26,840 INFO L225 Difference]: With dead ends: 19316 [2020-10-29 08:18:26,840 INFO L226 Difference]: Without dead ends: 12608 [2020-10-29 08:18:26,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:18:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12608 states. [2020-10-29 08:18:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12608 to 9943. [2020-10-29 08:18:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9943 states. [2020-10-29 08:18:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 13578 transitions. [2020-10-29 08:18:27,240 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 13578 transitions. Word has length 239 [2020-10-29 08:18:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:18:27,241 INFO L481 AbstractCegarLoop]: Abstraction has 9943 states and 13578 transitions. [2020-10-29 08:18:27,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:18:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 13578 transitions. [2020-10-29 08:18:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-29 08:18:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:18:27,248 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, 3, 3, 3, 3, 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] [2020-10-29 08:18:27,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:18:27,248 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:18:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:18:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash 804212512, now seen corresponding path program 1 times [2020-10-29 08:18:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:18:27,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849067902] [2020-10-29 08:18:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:18:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:27,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:27,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:32,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:32,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-29 08:18:32,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:18:32,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 08:18:32,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:32,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:18:32,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:18:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 08:18:32,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:18:32,560 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:18:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:18:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:32,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:32,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:32,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:18:32,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:18:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 08:18:32,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:32,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:32,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:18:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:18:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:18:32,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:18:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:18:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:32,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:33,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:33,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:18:33,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:18:33,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-29 08:18:33,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:33,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:18:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:18:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:18:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:33,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-29 08:18:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:33,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:18:33,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 08:18:33,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:18:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 08:18:33,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:18:33,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:18:33,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:18:33,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 08:18:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:18:33,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:18:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 116 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-29 08:18:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849067902] [2020-10-29 08:18:33,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:18:33,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:18:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715782700] [2020-10-29 08:18:33,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:18:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:18:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:18:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:18:33,499 INFO L87 Difference]: Start difference. First operand 9943 states and 13578 transitions. Second operand 7 states. [2020-10-29 08:18:33,714 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 08:18:40,643 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 08:18:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:18:55,606 INFO L93 Difference]: Finished difference Result 19718 states and 27275 transitions. [2020-10-29 08:18:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:18:55,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-29 08:18:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:18:55,657 INFO L225 Difference]: With dead ends: 19718 [2020-10-29 08:18:55,658 INFO L226 Difference]: Without dead ends: 10216 [2020-10-29 08:18:55,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:18:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10216 states. [2020-10-29 08:18:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10216 to 9560. [2020-10-29 08:18:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9560 states. [2020-10-29 08:18:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 13080 transitions. [2020-10-29 08:18:56,077 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 13080 transitions. Word has length 251 [2020-10-29 08:18:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:18:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 9560 states and 13080 transitions. [2020-10-29 08:18:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:18:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 13080 transitions. [2020-10-29 08:18:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-29 08:18:56,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:18:56,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-29 08:18:56,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:18:56,088 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:18:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:18:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1579239938, now seen corresponding path program 1 times [2020-10-29 08:18:56,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:18:56,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541835505] [2020-10-29 08:18:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:18:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:18:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:18:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:00,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:01,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:01,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-29 08:19:01,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:19:01,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 08:19:01,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:01,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:01,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:19:01,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-29 08:19:01,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:19:01,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:19:01,437 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:19:01,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:19:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:01,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:01,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:01,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:19:01,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:01,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:19:01,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:19:01,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:19:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:01,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:01,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:01,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:19:01,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:01,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 08:19:01,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:01,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:19:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:19:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:19:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:19:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:19:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:01,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:01,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 08:19:01,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:01,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-29 08:19:01,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:01,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:19:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:19:01,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 08:19:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:19:01,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-10-29 08:19:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:19:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:19:01,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:19:01,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:19:01,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:19:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 08:19:01,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:19:01,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:19:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:19:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:19:01,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:19:01,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:19:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 317 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-29 08:19:02,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541835505] [2020-10-29 08:19:02,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:19:02,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:19:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359623727] [2020-10-29 08:19:02,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:19:02,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:19:02,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:19:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:19:02,228 INFO L87 Difference]: Start difference. First operand 9560 states and 13080 transitions. Second operand 7 states. [2020-10-29 08:19:04,098 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 08:19:08,929 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 71