./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partial_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:48:47,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:48:47,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:48:47,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:48:47,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:48:47,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:48:47,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:48:47,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:48:47,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:48:47,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:48:47,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:48:47,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:48:47,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:48:47,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:48:47,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:48:47,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:48:47,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:48:47,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:48:47,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:48:47,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:48:47,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:48:47,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:48:47,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:48:47,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:48:47,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:48:47,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:48:47,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:48:47,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:48:47,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:48:47,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:48:47,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:48:47,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:48:47,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:48:47,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:48:47,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:48:47,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:48:47,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:48:47,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:48:47,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:48:47,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:48:47,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:48:47,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:48:47,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:48:47,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:48:47,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:48:47,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:48:47,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:48:47,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:48:47,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:48:47,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:48:47,842 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:48:47,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:48:47,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:48:47,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:48:47,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:48:47,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:48:47,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:48:47,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:48:47,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:48:47,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:48:47,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:48:47,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:48:47,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:48:47,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:48:47,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:48:47,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:48:47,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:48:47,847 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:48:47,847 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:48:47,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:48:47,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:48:47,848 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2021-12-21 09:48:48,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:48:48,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:48:48,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:48:48,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:48:48,113 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:48:48,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-12-21 09:48:48,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40296604e/87aa8f41345646eea5bfb334df6b2da7/FLAG54fbef6c5 [2021-12-21 09:48:48,554 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:48:48,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-12-21 09:48:48,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40296604e/87aa8f41345646eea5bfb334df6b2da7/FLAG54fbef6c5 [2021-12-21 09:48:48,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40296604e/87aa8f41345646eea5bfb334df6b2da7 [2021-12-21 09:48:48,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:48:48,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:48:48,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:48:48,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:48:48,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:48:48,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd5372a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48, skipping insertion in model container [2021-12-21 09:48:48,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:48:48,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:48:48,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2021-12-21 09:48:48,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:48:48,811 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:48:48,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2021-12-21 09:48:48,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:48:48,862 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:48:48,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48 WrapperNode [2021-12-21 09:48:48,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:48:48,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:48:48,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:48:48,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:48:48,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,907 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2021-12-21 09:48:48,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:48:48,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:48:48,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:48:48,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:48:48,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:48:48,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:48:48,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:48:48,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:48:48,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (1/1) ... [2021-12-21 09:48:48,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:48:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:48,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:48:48,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:48:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:48:49,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 09:48:49,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 09:48:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:48:49,076 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:48:49,078 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:48:49,190 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:48:49,196 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:48:49,196 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 09:48:49,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:49 BoogieIcfgContainer [2021-12-21 09:48:49,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:48:49,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:48:49,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:48:49,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:48:49,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:48" (1/3) ... [2021-12-21 09:48:49,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107c4854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:49, skipping insertion in model container [2021-12-21 09:48:49,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:48" (2/3) ... [2021-12-21 09:48:49,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107c4854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:49, skipping insertion in model container [2021-12-21 09:48:49,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:49" (3/3) ... [2021-12-21 09:48:49,205 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2021-12-21 09:48:49,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:48:49,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:48:49,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:48:49,257 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:48:49,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:48:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 09:48:49,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:49,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:49,277 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash 543579029, now seen corresponding path program 1 times [2021-12-21 09:48:49,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:49,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908125733] [2021-12-21 09:48:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:49,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:48:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:49,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908125733] [2021-12-21 09:48:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908125733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:48:49,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:48:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:48:49,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012149539] [2021-12-21 09:48:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:48:49,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:48:49,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:48:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:48:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:48:49,509 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:48:49,577 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-12-21 09:48:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:48:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 09:48:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:48:49,587 INFO L225 Difference]: With dead ends: 57 [2021-12-21 09:48:49,587 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 09:48:49,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:48:49,593 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:48:49,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:48:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 09:48:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-21 09:48:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-21 09:48:49,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-12-21 09:48:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:48:49,629 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-21 09:48:49,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-21 09:48:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 09:48:49,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:49,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:49,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:48:49,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2037184774, now seen corresponding path program 1 times [2021-12-21 09:48:49,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441957649] [2021-12-21 09:48:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:49,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:48:49,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441957649] [2021-12-21 09:48:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441957649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:48:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837675444] [2021-12-21 09:48:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:49,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:49,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:49,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:48:49,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:48:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:48:49,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:48:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:48:49,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:48:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:48:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837675444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:48:49,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:48:49,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:48:49,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211268110] [2021-12-21 09:48:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:48:49,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:48:49,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:48:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:48:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:48:49,913 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:48:49,964 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-12-21 09:48:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:48:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 09:48:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:48:49,966 INFO L225 Difference]: With dead ends: 62 [2021-12-21 09:48:49,966 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 09:48:49,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:48:49,968 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:48:49,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:48:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 09:48:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-21 09:48:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-21 09:48:49,976 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 16 [2021-12-21 09:48:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:48:49,976 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-21 09:48:49,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-21 09:48:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 09:48:49,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:49,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:50,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:48:50,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:50,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:50,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1365921470, now seen corresponding path program 2 times [2021-12-21 09:48:50,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:50,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666562403] [2021-12-21 09:48:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:50,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 09:48:50,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:50,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666562403] [2021-12-21 09:48:50,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666562403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:48:50,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607656120] [2021-12-21 09:48:50,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:48:50,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:50,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:48:50,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:48:50,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:48:50,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:48:50,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:48:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:48:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 09:48:50,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:48:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 09:48:50,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607656120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:48:50,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:48:50,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 09:48:50,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71200066] [2021-12-21 09:48:50,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:48:50,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:48:50,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:48:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:48:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:48:50,691 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:48:50,777 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2021-12-21 09:48:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:48:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-21 09:48:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:48:50,779 INFO L225 Difference]: With dead ends: 101 [2021-12-21 09:48:50,779 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 09:48:50,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:48:50,781 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:48:50,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:48:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 09:48:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-21 09:48:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-12-21 09:48:50,789 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 31 [2021-12-21 09:48:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:48:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-12-21 09:48:50,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-12-21 09:48:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 09:48:50,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:50,791 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:50,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:48:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 09:48:51,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash 68306806, now seen corresponding path program 3 times [2021-12-21 09:48:51,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768275425] [2021-12-21 09:48:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:51,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 09:48:51,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768275425] [2021-12-21 09:48:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768275425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:48:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962663558] [2021-12-21 09:48:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:48:51,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:51,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:48:51,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:48:54,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 09:48:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:48:54,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:48:54,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:48:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 09:48:55,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:48:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 09:48:55,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962663558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:48:55,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:48:55,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:48:55,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300426514] [2021-12-21 09:48:55,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:48:55,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:48:55,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:48:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:48:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:48:55,258 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:48:55,480 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2021-12-21 09:48:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:48:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 09:48:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:48:55,487 INFO L225 Difference]: With dead ends: 179 [2021-12-21 09:48:55,487 INFO L226 Difference]: Without dead ends: 131 [2021-12-21 09:48:55,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:48:55,490 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 261 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:48:55,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 64 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:48:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-21 09:48:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-21 09:48:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.204724409448819) internal successors, (153), 127 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2021-12-21 09:48:55,502 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 61 [2021-12-21 09:48:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:48:55,502 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2021-12-21 09:48:55,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2021-12-21 09:48:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 09:48:55,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:55,506 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:55,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:48:55,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:55,712 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1368382430, now seen corresponding path program 4 times [2021-12-21 09:48:55,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:55,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41710807] [2021-12-21 09:48:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:55,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-21 09:48:56,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:56,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41710807] [2021-12-21 09:48:56,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41710807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:48:56,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731770210] [2021-12-21 09:48:56,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:48:56,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:56,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:48:56,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:48:56,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:48:56,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:48:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:48:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:48:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-21 09:48:56,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:48:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-21 09:48:57,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731770210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:48:57,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:48:57,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 09:48:57,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147791579] [2021-12-21 09:48:57,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:48:57,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 09:48:57,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:48:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 09:48:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:48:57,393 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:48:57,816 INFO L93 Difference]: Finished difference Result 335 states and 458 transitions. [2021-12-21 09:48:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 09:48:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-21 09:48:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:48:57,818 INFO L225 Difference]: With dead ends: 335 [2021-12-21 09:48:57,818 INFO L226 Difference]: Without dead ends: 251 [2021-12-21 09:48:57,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:48:57,820 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 459 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:48:57,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 164 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:48:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-21 09:48:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-12-21 09:48:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.2024291497975708) internal successors, (297), 247 states have internal predecessors, (297), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 09:48:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2021-12-21 09:48:57,836 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 121 [2021-12-21 09:48:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:48:57,837 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2021-12-21 09:48:57,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:48:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2021-12-21 09:48:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-21 09:48:57,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:48:57,840 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:48:57,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:48:58,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:58,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:48:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:48:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1690281134, now seen corresponding path program 5 times [2021-12-21 09:48:58,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:48:58,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852578210] [2021-12-21 09:48:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:48:58,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:48:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:48:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-21 09:48:59,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:48:59,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852578210] [2021-12-21 09:48:59,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852578210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:48:59,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807920369] [2021-12-21 09:48:59,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:48:59,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:48:59,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:48:59,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:48:59,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process