/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/Problem19_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:49:18,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:49:18,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:49:18,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:49:18,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:49:18,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:49:18,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:49:18,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:49:18,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:49:18,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:49:18,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:49:18,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:49:18,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:49:18,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:49:18,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:49:18,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:49:18,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:49:18,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:49:18,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:49:18,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:49:18,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:49:18,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:49:18,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:49:18,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:49:18,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:49:18,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:49:18,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:49:18,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:49:18,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:49:18,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:49:18,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:49:18,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:49:18,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:49:18,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:49:18,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:49:18,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:49:18,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:49:18,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:49:18,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:49:18,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:49:18,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:49:18,735 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 08:49:18,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:49:18,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:49:18,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:49:18,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:49:18,801 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:49:18,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:49:18,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:49:18,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:49:18,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:49:18,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:49:18,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:49:18,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:49:18,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:49:18,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:49:18,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:49:18,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:49:18,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:49:18,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:49:18,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:49:18,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:49:18,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:49:18,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:49:18,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:49:18,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:49:18,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:49:18,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:49:18,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:49:18,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:49:18,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:49:18,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:49:19,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:49:19,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:49:19,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:49:19,295 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:49:19,296 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:49:19,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label27.c [2020-10-29 08:49:19,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13973aa58/0f88b7d917ca4ad6b3745bf619a893c6/FLAGcdc8c763b [2020-10-29 08:49:20,815 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:49:20,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label27.c [2020-10-29 08:49:20,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13973aa58/0f88b7d917ca4ad6b3745bf619a893c6/FLAGcdc8c763b [2020-10-29 08:49:21,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13973aa58/0f88b7d917ca4ad6b3745bf619a893c6 [2020-10-29 08:49:21,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:49:21,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:49:21,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:49:21,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:49:21,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:49:21,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:49:21" (1/1) ... [2020-10-29 08:49:21,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d4d9770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:21, skipping insertion in model container [2020-10-29 08:49:21,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:49:21" (1/1) ... [2020-10-29 08:49:21,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:49:21,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:49:23,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:49:23,622 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:49:24,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:49:24,915 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:49:24,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24 WrapperNode [2020-10-29 08:49:24,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:49:24,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:49:24,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:49:24,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:49:24,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:24,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (1/1) ... [2020-10-29 08:49:25,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:49:25,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:49:25,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:49:25,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:49:25,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (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 08:49:25,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:49:25,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:49:25,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:49:25,925 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:49:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:49:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:49:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:49:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:49:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:49:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:49:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:49:25,930 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:49:25,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:49:25,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:49:25,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:49:25,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:49:25,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:49:25,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:49:25,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:49:44,231 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:49:44,231 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:49:44,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:49:44 BoogieIcfgContainer [2020-10-29 08:49:44,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:49:44,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:49:44,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:49:44,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:49:44,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:49:21" (1/3) ... [2020-10-29 08:49:44,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22117c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:49:44, skipping insertion in model container [2020-10-29 08:49:44,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:49:24" (2/3) ... [2020-10-29 08:49:44,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22117c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:49:44, skipping insertion in model container [2020-10-29 08:49:44,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:49:44" (3/3) ... [2020-10-29 08:49:44,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label27.c [2020-10-29 08:49:44,266 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:49:44,275 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:49:44,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:49:44,342 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:49:44,342 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:49:44,342 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:49:44,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:49:44,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:49:44,343 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:49:44,343 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:49:44,343 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:49:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:49:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 08:49:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:44,412 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] [2020-10-29 08:49:44,413 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -12114979, now seen corresponding path program 1 times [2020-10-29 08:49:44,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:44,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110101985] [2020-10-29 08:49:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:45,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:45,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:45,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 08:49:45,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:45,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-29 08:49:45,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:45,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:45,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:45,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:45,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 08:49:45,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:49:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:45,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:45,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 08:49:45,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:45,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:45,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:45,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:45,988 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 08:49:45,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110101985] [2020-10-29 08:49:45,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:45,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:49:45,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101455532] [2020-10-29 08:49:46,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:49:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:49:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:49:46,024 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-29 08:50:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:44,206 INFO L93 Difference]: Finished difference Result 6577 states and 12487 transitions. [2020-10-29 08:50:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:50:44,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-29 08:50:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:44,276 INFO L225 Difference]: With dead ends: 6577 [2020-10-29 08:50:44,277 INFO L226 Difference]: Without dead ends: 4728 [2020-10-29 08:50:44,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:50:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2020-10-29 08:50:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4641. [2020-10-29 08:50:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4641 states. [2020-10-29 08:50:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 7459 transitions. [2020-10-29 08:50:44,697 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 7459 transitions. Word has length 34 [2020-10-29 08:50:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:50:44,699 INFO L481 AbstractCegarLoop]: Abstraction has 4641 states and 7459 transitions. [2020-10-29 08:50:44,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:50:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 7459 transitions. [2020-10-29 08:50:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-29 08:50:44,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:44,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:50:44,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:50:44,715 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:44,719 INFO L82 PathProgramCache]: Analyzing trace with hash -506711724, now seen corresponding path program 1 times [2020-10-29 08:50:44,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:44,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952804188] [2020-10-29 08:50:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:46,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 08:50:46,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:50:46,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-29 08:50:46,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:46,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:50:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:50:46,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:50:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:50:46,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:50:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:46,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:50:46,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:46,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:50:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:50:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:50:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:47,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:47,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:50:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-29 08:50:47,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:47,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:50:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:50:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:50:47,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:50:47,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952804188] [2020-10-29 08:50:47,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:50:47,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:50:47,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117139313] [2020-10-29 08:50:47,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:50:47,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:50:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:50:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:50:47,240 INFO L87 Difference]: Start difference. First operand 4641 states and 7459 transitions. Second operand 7 states. [2020-10-29 08:50:48,709 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:51:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:51:31,707 INFO L93 Difference]: Finished difference Result 13779 states and 22446 transitions. [2020-10-29 08:51:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:51:31,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-29 08:51:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:51:31,773 INFO L225 Difference]: With dead ends: 13779 [2020-10-29 08:51:31,774 INFO L226 Difference]: Without dead ends: 9144 [2020-10-29 08:51:31,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:51:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9144 states. [2020-10-29 08:51:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9144 to 9009. [2020-10-29 08:51:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9009 states. [2020-10-29 08:51:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9009 states to 9009 states and 12655 transitions. [2020-10-29 08:51:32,135 INFO L78 Accepts]: Start accepts. Automaton has 9009 states and 12655 transitions. Word has length 109 [2020-10-29 08:51:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:51:32,136 INFO L481 AbstractCegarLoop]: Abstraction has 9009 states and 12655 transitions. [2020-10-29 08:51:32,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:51:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9009 states and 12655 transitions. [2020-10-29 08:51:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 08:51:32,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:51:32,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:32,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:51:32,140 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:51:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:51:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1926602478, now seen corresponding path program 1 times [2020-10-29 08:51:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:51:32,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607590827] [2020-10-29 08:51:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:51:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:33,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:34,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:34,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-29 08:51:34,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:51:34,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2327 [2020-10-29 08:51:34,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:34,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:34,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:51:34,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:51:34,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:51:34,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:34,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:51:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:34,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:51:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:51:34,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:34,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:51:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:51:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:51:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:34,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:51:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:35,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:35,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:51:35,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:35,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-29 08:51:35,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:35,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:35,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:51:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:51:35,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:51:35,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:51:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607590827] [2020-10-29 08:51:35,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:51:35,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:51:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371861070] [2020-10-29 08:51:35,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:51:35,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:51:35,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:51:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:51:35,240 INFO L87 Difference]: Start difference. First operand 9009 states and 12655 transitions. Second operand 7 states. [2020-10-29 08:51:35,389 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:52:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:52:32,115 INFO L93 Difference]: Finished difference Result 27399 states and 39645 transitions. [2020-10-29 08:52:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:52:32,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-29 08:52:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:52:32,233 INFO L225 Difference]: With dead ends: 27399 [2020-10-29 08:52:32,233 INFO L226 Difference]: Without dead ends: 18396 [2020-10-29 08:52:32,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:52:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18396 states. [2020-10-29 08:52:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18396 to 18142. [2020-10-29 08:52:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18142 states. [2020-10-29 08:52:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18142 states to 18142 states and 23728 transitions. [2020-10-29 08:52:32,908 INFO L78 Accepts]: Start accepts. Automaton has 18142 states and 23728 transitions. Word has length 135 [2020-10-29 08:52:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:52:32,911 INFO L481 AbstractCegarLoop]: Abstraction has 18142 states and 23728 transitions. [2020-10-29 08:52:32,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:52:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 18142 states and 23728 transitions. [2020-10-29 08:52:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-29 08:52:32,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:52:32,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:52:32,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:52:32,929 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:52:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:52:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash 278193414, now seen corresponding path program 1 times [2020-10-29 08:52:32,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:52:32,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186545874] [2020-10-29 08:52:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:52:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:33,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:33,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:34,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:34,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-29 08:52:34,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:52:34,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-29 08:52:34,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:34,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:34,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:52:34,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:52:34,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 08:52:34,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:52:34,612 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:52:34,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:52:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:34,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:34,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:52:34,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:52:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:52:34,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:34,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:52:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:52:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:52:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:52:34,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:52:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:52:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:34,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:52:35,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:52:35,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:52:35,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:52:35,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-29 08:52:35,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:52:35,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:52:35,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:52:35,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:52:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:52:35,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:52:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:52:35,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186545874] [2020-10-29 08:52:35,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:52:35,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:52:35,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519348386] [2020-10-29 08:52:35,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:52:35,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:52:35,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:52:35,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:52:35,340 INFO L87 Difference]: Start difference. First operand 18142 states and 23728 transitions. Second operand 7 states. [2020-10-29 08:52:35,507 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68