./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-fpi/res2.c -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 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:50:50,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:50:50,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:50:50,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:50:50,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:50:50,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:50:50,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:50:50,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:50:50,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:50:50,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:50:50,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:50:50,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:50:50,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:50:50,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:50:50,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:50:50,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:50:50,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:50:50,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:50:50,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:50:50,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:50:50,694 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:50:50,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:50:50,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:50:50,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:50:50,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:50:50,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:50:50,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:50:50,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:50:50,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:50:50,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:50:50,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:50:50,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:50:50,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:50:50,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:50:50,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:50:50,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:50:50,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:50:50,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:50:50,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:50:50,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:50:50,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:50:50,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:50:50,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:50:50,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:50:50,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:50:50,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:50:50,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:50:50,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:50:50,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:50:50,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:50:50,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:50:50,731 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:50:50,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:50:50,732 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:50:50,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:50:50,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:50:50,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:50:50,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:50:50,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:50:50,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:50:50,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:50:50,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:50:50,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:50:50,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:50:50,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:50:50,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:50:50,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:50:50,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:50:50,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:50:50,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:50:50,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:50:50,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:50:50,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:50:50,737 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:50:50,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:50:50,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:50:50,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 105e7597bd9cfde6146cefe87563ba1bc48309677fb8b2f1d1f421bc92453e6b [2022-07-22 10:50:50,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:50:50,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:50:50,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:50:50,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:50:50,976 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:50:50,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2.c [2022-07-22 10:50:51,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0151acb57/f797fafca7a24290a28f745e170ed61e/FLAGde6e0cbf4 [2022-07-22 10:50:51,427 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:50:51,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2.c [2022-07-22 10:50:51,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0151acb57/f797fafca7a24290a28f745e170ed61e/FLAGde6e0cbf4 [2022-07-22 10:50:51,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0151acb57/f797fafca7a24290a28f745e170ed61e [2022-07-22 10:50:51,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:50:51,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:50:51,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:50:51,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:50:51,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:50:51,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:50:51" (1/1) ... [2022-07-22 10:50:51,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23dca90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:51, skipping insertion in model container [2022-07-22 10:50:51,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:50:51" (1/1) ... [2022-07-22 10:50:51,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:50:51,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:50:52,004 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-fpi/res2.c[587,600] [2022-07-22 10:50:52,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:50:52,028 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:50:52,038 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-fpi/res2.c[587,600] [2022-07-22 10:50:52,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:50:52,057 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:50:52,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52 WrapperNode [2022-07-22 10:50:52,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:50:52,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:50:52,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:50:52,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:50:52,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,094 INFO L137 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2022-07-22 10:50:52,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:50:52,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:50:52,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:50:52,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:50:52,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:50:52,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:50:52,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:50:52,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:50:52,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (1/1) ... [2022-07-22 10:50:52,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:50:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:50:52,169 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) [2022-07-22 10:50:52,170 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 [2022-07-22 10:50:52,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:50:52,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:50:52,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:50:52,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:50:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 10:50:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:50:52,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:50:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:50:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:50:52,272 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:50:52,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:50:52,452 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:50:52,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:50:52,458 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 10:50:52,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:50:52 BoogieIcfgContainer [2022-07-22 10:50:52,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:50:52,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:50:52,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:50:52,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:50:52,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:50:51" (1/3) ... [2022-07-22 10:50:52,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebe3507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:50:52, skipping insertion in model container [2022-07-22 10:50:52,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:50:52" (2/3) ... [2022-07-22 10:50:52,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebe3507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:50:52, skipping insertion in model container [2022-07-22 10:50:52,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:50:52" (3/3) ... [2022-07-22 10:50:52,472 INFO L111 eAbstractionObserver]: Analyzing ICFG res2.c [2022-07-22 10:50:52,482 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:50:52,482 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:50:52,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:50:52,523 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e55afd4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@dc72387 [2022-07-22 10:50:52,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:50:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:50:52,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:50:52,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:50:52,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:50:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:50:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2022-07-22 10:50:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:50:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134514733] [2022-07-22 10:50:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:50:52,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:50:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:50:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:50:52,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:50:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134514733] [2022-07-22 10:50:52,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134514733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:50:52,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:50:52,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:50:52,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430209215] [2022-07-22 10:50:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:50:52,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:50:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:50:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:50:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:50:52,740 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:50:52,757 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-07-22 10:50:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:50:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 10:50:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:50:52,765 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:50:52,765 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 10:50:52,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:50:52,771 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:50:52,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:50:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 10:50:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 10:50:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 10:50:52,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2022-07-22 10:50:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:50:52,802 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 10:50:52,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 10:50:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:50:52,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:50:52,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:50:52,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:50:52,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:50:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:50:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2022-07-22 10:50:52,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:50:52,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367289520] [2022-07-22 10:50:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:50:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:50:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:50:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:50:52,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:50:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367289520] [2022-07-22 10:50:52,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367289520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:50:52,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:50:52,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:50:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570407145] [2022-07-22 10:50:52,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:50:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:50:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:50:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:50:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:50:52,931 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:50:53,012 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-22 10:50:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:50:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 10:50:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:50:53,014 INFO L225 Difference]: With dead ends: 57 [2022-07-22 10:50:53,014 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 10:50:53,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:50:53,016 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:50:53,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:50:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 10:50:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-07-22 10:50:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-22 10:50:53,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2022-07-22 10:50:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:50:53,023 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-22 10:50:53,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:50:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-22 10:50:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:50:53,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:50:53,024 INFO L195 NwaCegarLoop]: 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] [2022-07-22 10:50:53,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:50:53,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:50:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:50:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2022-07-22 10:50:53,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:50:53,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159301009] [2022-07-22 10:50:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:50:53,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:50:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:50:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:50:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:50:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159301009] [2022-07-22 10:50:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159301009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:50:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559732855] [2022-07-22 10:50:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:50:53,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:50:53,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:50:53,995 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) [2022-07-22 10:50:54,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:50:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:50:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 10:50:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:50:54,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:50:54,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:50:54,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-22 10:50:54,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-22 10:50:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:54,687 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-22 10:50:54,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-22 10:50:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:54,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-22 10:50:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:55,043 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-22 10:50:55,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-07-22 10:50:55,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:55,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-22 10:50:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:50:55,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2022-07-22 10:50:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:50:55,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:51:22,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:22,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:22,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:51:22,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559732855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:51:22,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:51:22,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-07-22 10:51:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787564790] [2022-07-22 10:51:22,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:51:22,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 10:51:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:51:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 10:51:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1359, Unknown=10, NotChecked=0, Total=1640 [2022-07-22 10:51:22,790 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:51:27,078 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-07-22 10:51:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 10:51:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 10:51:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:51:27,081 INFO L225 Difference]: With dead ends: 78 [2022-07-22 10:51:27,081 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 10:51:27,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=482, Invalid=2369, Unknown=11, NotChecked=0, Total=2862 [2022-07-22 10:51:27,083 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:51:27,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 158 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 171 Invalid, 0 Unknown, 400 Unchecked, 0.2s Time] [2022-07-22 10:51:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 10:51:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-07-22 10:51:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-07-22 10:51:27,105 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 31 [2022-07-22 10:51:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:51:27,105 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-07-22 10:51:27,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-07-22 10:51:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 10:51:27,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:51:27,108 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:51:27,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:51:27,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:51:27,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:51:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:51:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2022-07-22 10:51:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:51:27,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917104515] [2022-07-22 10:51:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:51:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:51:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:51:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:51:27,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:51:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917104515] [2022-07-22 10:51:27,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917104515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:51:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190759438] [2022-07-22 10:51:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:51:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:51:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:51:27,434 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) [2022-07-22 10:51:27,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:51:27,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:51:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:51:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:51:27,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:51:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:51:27,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:51:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:51:27,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190759438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:51:27,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:51:27,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 10:51:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630420707] [2022-07-22 10:51:27,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:51:27,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 10:51:27,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:51:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 10:51:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:51:27,603 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:51:27,800 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2022-07-22 10:51:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 10:51:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-22 10:51:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:51:27,803 INFO L225 Difference]: With dead ends: 138 [2022-07-22 10:51:27,803 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 10:51:27,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-22 10:51:27,805 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:51:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 35 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:51:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 10:51:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-07-22 10:51:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-22 10:51:27,818 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 33 [2022-07-22 10:51:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:51:27,819 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-22 10:51:27,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-22 10:51:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:51:27,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:51:27,824 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:51:27,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:51:28,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 10:51:28,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:51:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:51:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash 447877832, now seen corresponding path program 3 times [2022-07-22 10:51:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:51:28,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451376657] [2022-07-22 10:51:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:51:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:51:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:51:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:51:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:51:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451376657] [2022-07-22 10:51:28,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451376657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:51:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579420926] [2022-07-22 10:51:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:51:28,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:51:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:51:28,128 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) [2022-07-22 10:51:28,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:51:28,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:51:28,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:51:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:51:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:51:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:51:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:51:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:51:28,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579420926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:51:28,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:51:28,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 10:51:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789473975] [2022-07-22 10:51:28,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:51:28,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 10:51:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:51:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 10:51:28,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:51:28,329 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:51:28,518 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-07-22 10:51:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 10:51:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-22 10:51:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:51:28,519 INFO L225 Difference]: With dead ends: 65 [2022-07-22 10:51:28,519 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 10:51:28,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:51:28,520 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:51:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 30 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:51:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 10:51:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-07-22 10:51:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-07-22 10:51:28,525 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 35 [2022-07-22 10:51:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:51:28,526 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-07-22 10:51:28,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:51:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-07-22 10:51:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 10:51:28,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:51:28,527 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 10:51:28,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 10:51:28,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:51:28,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:51:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:51:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2022-07-22 10:51:28,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:51:28,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466382772] [2022-07-22 10:51:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:51:28,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:51:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:51:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:51:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:51:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466382772] [2022-07-22 10:51:30,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466382772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:51:30,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212045356] [2022-07-22 10:51:30,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:51:30,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:51:30,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:51:30,460 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) [2022-07-22 10:51:30,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:51:30,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:51:30,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:51:30,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-22 10:51:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:51:30,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:51:30,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:30,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 10:51:30,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:30,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:30,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-22 10:51:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-22 10:51:31,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-07-22 10:51:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:31,459 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-22 10:51:31,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2022-07-22 10:51:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:31,744 INFO L356 Elim1Store]: treesize reduction 44, result has 31.3 percent of original size [2022-07-22 10:51:31,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 80 treesize of output 80 [2022-07-22 10:51:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:31,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:31,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-22 10:51:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-07-22 10:51:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:32,377 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-22 10:51:32,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2022-07-22 10:51:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:32,680 INFO L356 Elim1Store]: treesize reduction 44, result has 31.3 percent of original size [2022-07-22 10:51:32,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 81 treesize of output 81 [2022-07-22 10:51:32,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:51:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:32,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-07-22 10:51:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:33,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-07-22 10:51:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:51:33,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-07-22 10:51:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:51:33,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:55:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:55:32,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212045356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:55:32,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:55:32,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 27] total 82 [2022-07-22 10:55:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990655090] [2022-07-22 10:55:32,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:55:32,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-22 10:55:32,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:55:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-22 10:55:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=5918, Unknown=98, NotChecked=0, Total=6642 [2022-07-22 10:55:32,829 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)