/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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:47:58,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:47:58,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:47:58,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:47:58,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:47:58,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:47:58,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:47:58,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:47:58,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:47:58,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:47:58,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:47:58,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:47:58,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:47:58,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:47:58,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:47:58,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:47:58,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:47:58,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:47:58,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:47:58,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:47:58,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:47:58,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:47:58,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:47:58,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:47:58,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:47:58,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:47:58,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:47:58,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:47:58,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:47:58,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:47:58,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:47:58,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:47:58,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:47:58,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:47:58,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:47:58,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:47:58,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:47:58,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:47:58,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:47:58,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:47:58,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:47:58,849 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 08:47:58,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:47:58,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:47:58,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:47:58,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:47:58,925 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:47:58,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:47:58,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:47:58,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:47:58,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:47:58,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:47:58,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:47:58,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:47:58,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:47:58,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:47:58,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:47:58,931 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:47:58,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:47:58,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:47:58,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:47:58,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:47:58,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:47:58,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:47:58,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:47:58,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:47:58,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:47:58,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:47:58,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:47:58,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:47:58,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:47:58,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:47:59,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:47:59,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:47:59,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:47:59,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:47:59,491 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:47:59,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-29 08:47:59,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ab57a3d3/5c84a0eeced6420e942df929bc396bff/FLAG7b9eb155d [2020-10-29 08:48:00,807 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:48:00,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-29 08:48:00,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ab57a3d3/5c84a0eeced6420e942df929bc396bff/FLAG7b9eb155d [2020-10-29 08:48:01,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ab57a3d3/5c84a0eeced6420e942df929bc396bff [2020-10-29 08:48:01,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:48:01,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:48:01,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:01,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:48:01,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:48:01,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:01" (1/1) ... [2020-10-29 08:48:01,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afc6b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:01, skipping insertion in model container [2020-10-29 08:48:01,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:01" (1/1) ... [2020-10-29 08:48:01,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:48:01,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:48:03,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:03,786 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:48:04,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:05,045 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:48:05,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05 WrapperNode [2020-10-29 08:48:05,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:05,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:48:05,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:48:05,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:48:05,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (1/1) ... [2020-10-29 08:48:05,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:48:05,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:48:05,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:48:05,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:48:05,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (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 08:48:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:48:05,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:48:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:48:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:48:05,853 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:48:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:48:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:48:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:48:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:48:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:48:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:48:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:48:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:48:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:48:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:48:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:48:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:48:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:48:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:48:21,392 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:48:21,394 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:48:21,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:48:21 BoogieIcfgContainer [2020-10-29 08:48:21,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:48:21,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:48:21,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:48:21,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:48:21,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:48:01" (1/3) ... [2020-10-29 08:48:21,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a262638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:48:21, skipping insertion in model container [2020-10-29 08:48:21,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:05" (2/3) ... [2020-10-29 08:48:21,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a262638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:48:21, skipping insertion in model container [2020-10-29 08:48:21,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:48:21" (3/3) ... [2020-10-29 08:48:21,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2020-10-29 08:48:21,429 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:48:21,437 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:48:21,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:48:21,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:48:21,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:48:21,513 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:48:21,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:48:21,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:48:21,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:48:21,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:48:21,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:48:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:48:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 08:48:21,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:21,607 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] [2020-10-29 08:48:21,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 162938141, now seen corresponding path program 1 times [2020-10-29 08:48:21,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:21,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621005591] [2020-10-29 08:48:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:22,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:22,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 08:48:22,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:22,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-29 08:48:22,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:22,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:22,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:48:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:48:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 08:48:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:48:23,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:48:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:23,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:23,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:23,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:48:23,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 08:48:23,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:23,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:48:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:48:23,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:23,148 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 08:48:23,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621005591] [2020-10-29 08:48:23,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:48:23,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:48:23,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126303680] [2020-10-29 08:48:23,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:48:23,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:48:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:48:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:48:23,188 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:48:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:48:57,232 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-29 08:48:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:48:57,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-29 08:48:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:48:57,296 INFO L225 Difference]: With dead ends: 5036 [2020-10-29 08:48:57,296 INFO L226 Difference]: Without dead ends: 3191 [2020-10-29 08:48:57,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:48:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-29 08:48:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-29 08:48:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-29 08:48:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-29 08:48:57,606 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 50 [2020-10-29 08:48:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:48:57,609 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-29 08:48:57,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:48:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-29 08:48:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 08:48:57,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:57,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:57,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:48:57,631 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash 55848255, now seen corresponding path program 1 times [2020-10-29 08:48:57,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:57,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055269794] [2020-10-29 08:48:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:58,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:00,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:00,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 08:49:00,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:49:00,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2716 [2020-10-29 08:49:00,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:00,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:49:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:49:00,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:00,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:00,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:00,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:00,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:00,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 08:49:00,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:00,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:00,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:00,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:00,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:49:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:00,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:00,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:00,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:00,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:49:00,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:49:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-29 08:49:00,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:00,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:49:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:49:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:49:00,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:49:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:49:01,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055269794] [2020-10-29 08:49:01,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:01,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:49:01,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290584201] [2020-10-29 08:49:01,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:49:01,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:49:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:49:01,238 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 7 states. [2020-10-29 08:50:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:05,698 INFO L93 Difference]: Finished difference Result 9391 states and 14745 transitions. [2020-10-29 08:50:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 08:50:05,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-29 08:50:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:05,756 INFO L225 Difference]: With dead ends: 9391 [2020-10-29 08:50:05,757 INFO L226 Difference]: Without dead ends: 6212 [2020-10-29 08:50:05,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:50:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2020-10-29 08:50:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 6135. [2020-10-29 08:50:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2020-10-29 08:50:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8618 transitions. [2020-10-29 08:50:06,041 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8618 transitions. Word has length 123 [2020-10-29 08:50:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:50:06,045 INFO L481 AbstractCegarLoop]: Abstraction has 6135 states and 8618 transitions. [2020-10-29 08:50:06,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:50:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8618 transitions. [2020-10-29 08:50:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-29 08:50:06,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:06,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:50:06,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:50:06,060 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1138077870, now seen corresponding path program 1 times [2020-10-29 08:50:06,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:06,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448525961] [2020-10-29 08:50:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:07,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:08,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:08,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-29 08:50:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:50:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2449 [2020-10-29 08:50:08,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:08,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:50:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:50:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:50:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:08,943 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:50:08,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:50:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:08,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:08,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:50:08,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:08,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 08:50:08,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:08,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:08,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:50:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:50:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:50:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:09,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:50:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:09,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:09,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:50:09,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 08:50:09,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:09,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:09,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:50:09,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:50:09,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:50:09,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:50:09,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448525961] [2020-10-29 08:50:09,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:50:09,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:50:09,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357627528] [2020-10-29 08:50:09,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:50:09,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:50:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:50:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:50:09,542 INFO L87 Difference]: Start difference. First operand 6135 states and 8618 transitions. Second operand 7 states. [2020-10-29 08:50:09,726 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:50:11,904 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:51:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:51:11,365 INFO L93 Difference]: Finished difference Result 18558 states and 26404 transitions. [2020-10-29 08:51:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:51:11,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2020-10-29 08:51:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:51:11,453 INFO L225 Difference]: With dead ends: 18558 [2020-10-29 08:51:11,453 INFO L226 Difference]: Without dead ends: 12429 [2020-10-29 08:51:11,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:51:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12429 states. [2020-10-29 08:51:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12429 to 12210. [2020-10-29 08:51:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12210 states. [2020-10-29 08:51:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12210 states to 12210 states and 15704 transitions. [2020-10-29 08:51:11,888 INFO L78 Accepts]: Start accepts. Automaton has 12210 states and 15704 transitions. Word has length 151 [2020-10-29 08:51:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:51:11,893 INFO L481 AbstractCegarLoop]: Abstraction has 12210 states and 15704 transitions. [2020-10-29 08:51:11,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:51:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 12210 states and 15704 transitions. [2020-10-29 08:51:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-29 08:51:11,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:51:11,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:11,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:51:11,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:51:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:51:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1968515910, now seen corresponding path program 1 times [2020-10-29 08:51:11,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:51:11,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375405928] [2020-10-29 08:51:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:51:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:12,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:12,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:13,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:13,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-29 08:51:13,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:51:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-29 08:51:13,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:13,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:51:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:51:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-29 08:51:13,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:13,964 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:51:13,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:51:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:13,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:13,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:51:13,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:13,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:51:13,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:13,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:51:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:51:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:51:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:51:14,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:51:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:14,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:51:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:51:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-29 08:51:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:14,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:51:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:51:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:51:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:51:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375405928] [2020-10-29 08:51:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:51:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:51:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902368262] [2020-10-29 08:51:14,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:51:14,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:51:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:51:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:51:14,765 INFO L87 Difference]: Start difference. First operand 12210 states and 15704 transitions. Second operand 7 states. [2020-10-29 08:51:14,966 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:51:19,186 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66