./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr2.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-tiling/pnr2.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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:47:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:47:03,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:47:03,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:47:03,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:47:03,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:47:03,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:47:03,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:47:03,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:47:03,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:47:03,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:47:03,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:47:03,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:47:03,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:47:03,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:47:03,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:47:03,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:47:03,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:47:03,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:47:03,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:47:03,565 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:47:03,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:47:03,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:47:03,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:47:03,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:47:03,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:47:03,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:47:03,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:47:03,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:47:03,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:47:03,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:47:03,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:47:03,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:47:03,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:47:03,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:47:03,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:47:03,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:47:03,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:47:03,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:47:03,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:47:03,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:47:03,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:47:03,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:47:03,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:47:03,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:47:03,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:47:03,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:47:03,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:47:03,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:47:03,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:47:03,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:47:03,607 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:47:03,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:47:03,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:47:03,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:47:03,609 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:47:03,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:47:03,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:47:03,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:47:03,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:47:03,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:47:03,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:47:03,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:47:03,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:47:03,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:47:03,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:47:03,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:47:03,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:47:03,612 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:47:03,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:47:03,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:47:03,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2022-07-22 09:47:03,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:47:03,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:47:03,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:47:03,808 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:47:03,809 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:47:03,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2022-07-22 09:47:03,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c042d49fe/34aba25fe4b441f4a11f9eb96e429eaa/FLAG2a5f0adc2 [2022-07-22 09:47:04,149 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:47:04,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2022-07-22 09:47:04,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c042d49fe/34aba25fe4b441f4a11f9eb96e429eaa/FLAG2a5f0adc2 [2022-07-22 09:47:04,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c042d49fe/34aba25fe4b441f4a11f9eb96e429eaa [2022-07-22 09:47:04,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:47:04,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:47:04,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:47:04,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:47:04,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:47:04,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fab1a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04, skipping insertion in model container [2022-07-22 09:47:04,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:47:04,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:47:04,755 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-tiling/pnr2.c[395,408] [2022-07-22 09:47:04,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:47:04,794 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:47:04,809 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-tiling/pnr2.c[395,408] [2022-07-22 09:47:04,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:47:04,836 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:47:04,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04 WrapperNode [2022-07-22 09:47:04,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:47:04,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:47:04,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:47:04,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:47:04,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,876 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-22 09:47:04,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:47:04,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:47:04,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:47:04,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:47:04,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:47:04,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:47:04,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:47:04,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:47:04,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (1/1) ... [2022-07-22 09:47:04,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:47:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:04,939 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 09:47:04,945 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 09:47:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:47:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:47:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:47:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:47:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-22 09:47:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-22 09:47:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:47:04,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:47:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:47:05,012 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:47:05,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:47:05,104 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:47:05,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:47:05,109 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:47:05,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:47:05 BoogieIcfgContainer [2022-07-22 09:47:05,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:47:05,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:47:05,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:47:05,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:47:05,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:47:04" (1/3) ... [2022-07-22 09:47:05,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b850cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:47:05, skipping insertion in model container [2022-07-22 09:47:05,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:47:04" (2/3) ... [2022-07-22 09:47:05,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b850cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:47:05, skipping insertion in model container [2022-07-22 09:47:05,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:47:05" (3/3) ... [2022-07-22 09:47:05,115 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2022-07-22 09:47:05,124 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:47:05,124 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:47:05,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:47:05,157 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@16979866, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a491ff3 [2022-07-22 09:47:05,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:47:05,173 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) [2022-07-22 09:47:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:47:05,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:05,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:05,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:05,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2022-07-22 09:47:05,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:05,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026488913] [2022-07-22 09:47:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:05,484 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 09:47:05,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026488913] [2022-07-22 09:47:05,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026488913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:47:05,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:47:05,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:47:05,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037064832] [2022-07-22 09:47:05,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:47:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:47:05,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:47:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:47:05,508 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 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 09:47:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:05,644 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-22 09:47:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:47:05,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2022-07-22 09:47:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:05,656 INFO L225 Difference]: With dead ends: 66 [2022-07-22 09:47:05,656 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 09:47:05,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:47:05,661 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:05,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 09:47:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-07-22 09:47:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-07-22 09:47:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-22 09:47:05,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-07-22 09:47:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:05,688 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-22 09:47:05,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 09:47:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-22 09:47:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:47:05,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:05,690 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] [2022-07-22 09:47:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:47:05,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2022-07-22 09:47:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:05,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597553171] [2022-07-22 09:47:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597553171] [2022-07-22 09:47:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597553171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649233598] [2022-07-22 09:47:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:05,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:05,855 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 09:47:05,891 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 09:47:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:47:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:05,997 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 16 treesize of output 12 [2022-07-22 09:47:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:47:06,037 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 22 treesize of output 21 [2022-07-22 09:47:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:06,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:06,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2022-07-22 09:47:06,210 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 24 treesize of output 22 [2022-07-22 09:47:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:06,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649233598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:06,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:06,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-22 09:47:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051994701] [2022-07-22 09:47:06,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:47:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:47:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:47:06,229 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 09:47:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:06,411 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-22 09:47:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:47:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-22 09:47:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:06,412 INFO L225 Difference]: With dead ends: 66 [2022-07-22 09:47:06,412 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 09:47:06,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:47:06,414 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:06,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 09:47:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2022-07-22 09:47:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 09:47:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-07-22 09:47:06,421 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2022-07-22 09:47:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:06,421 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-07-22 09:47:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 09:47:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-07-22 09:47:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 09:47:06,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:06,422 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] [2022-07-22 09:47:06,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:47:06,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:06,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2022-07-22 09:47:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592943248] [2022-07-22 09:47:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:06,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:06,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:06,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592943248] [2022-07-22 09:47:06,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592943248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:06,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100521361] [2022-07-22 09:47:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:06,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:06,812 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 09:47:06,813 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 09:47:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:47:06,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:06,939 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 16 treesize of output 12 [2022-07-22 09:47:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:47:07,011 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 21 treesize of output 20 [2022-07-22 09:47:07,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-22 09:47:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:47:07,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:07,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 09:47:07,162 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 30 treesize of output 28 [2022-07-22 09:47:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:07,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100521361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:07,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:07,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-22 09:47:07,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787651508] [2022-07-22 09:47:07,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:07,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:47:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:47:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:47:07,215 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 09:47:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:07,637 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-07-22 09:47:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 09:47:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2022-07-22 09:47:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:07,639 INFO L225 Difference]: With dead ends: 116 [2022-07-22 09:47:07,639 INFO L226 Difference]: Without dead ends: 114 [2022-07-22 09:47:07,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:47:07,641 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:07,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 375 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 389 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-07-22 09:47:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-22 09:47:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2022-07-22 09:47:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 09:47:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-07-22 09:47:07,649 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2022-07-22 09:47:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:07,650 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-07-22 09:47:07,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 09:47:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-07-22 09:47:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 09:47:07,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:07,651 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 09:47:07,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 09:47:07,868 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,SelfDestructingSolverStorable2 [2022-07-22 09:47:07,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2022-07-22 09:47:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:07,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110279104] [2022-07-22 09:47:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:07,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:07,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110279104] [2022-07-22 09:47:07,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110279104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181555092] [2022-07-22 09:47:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:07,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:07,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:07,975 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 09:47:07,992 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 09:47:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:47:08,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:08,063 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 13 treesize of output 9 [2022-07-22 09:47:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:08,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:08,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:08,157 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 30 treesize of output 26 [2022-07-22 09:47:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181555092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:08,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:08,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-22 09:47:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413864417] [2022-07-22 09:47:08,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:08,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:47:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:47:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:47:08,177 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:47:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:08,367 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-22 09:47:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 09:47:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-22 09:47:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:08,369 INFO L225 Difference]: With dead ends: 108 [2022-07-22 09:47:08,369 INFO L226 Difference]: Without dead ends: 106 [2022-07-22 09:47:08,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:47:08,370 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:08,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 200 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-22 09:47:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2022-07-22 09:47:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 09:47:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2022-07-22 09:47:08,392 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2022-07-22 09:47:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:08,393 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2022-07-22 09:47:08,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:47:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2022-07-22 09:47:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 09:47:08,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:08,394 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 09:47:08,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:08,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2022-07-22 09:47:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:08,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290023152] [2022-07-22 09:47:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:08,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290023152] [2022-07-22 09:47:08,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290023152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:08,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995464044] [2022-07-22 09:47:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:08,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:08,731 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 09:47:08,761 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 09:47:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:47:08,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:08,855 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 13 treesize of output 9 [2022-07-22 09:47:08,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-22 09:47:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:08,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:08,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:09,001 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 36 treesize of output 32 [2022-07-22 09:47:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:09,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995464044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:09,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:09,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-22 09:47:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970487301] [2022-07-22 09:47:09,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:09,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:47:09,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:47:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:47:09,064 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:09,552 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2022-07-22 09:47:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:47:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-07-22 09:47:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:09,553 INFO L225 Difference]: With dead ends: 152 [2022-07-22 09:47:09,554 INFO L226 Difference]: Without dead ends: 150 [2022-07-22 09:47:09,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:47:09,555 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:09,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-22 09:47:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2022-07-22 09:47:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 09:47:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-07-22 09:47:09,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-07-22 09:47:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:09,563 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-07-22 09:47:09,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-07-22 09:47:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 09:47:09,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:09,565 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:09,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:09,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2022-07-22 09:47:09,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:09,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978966086] [2022-07-22 09:47:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978966086] [2022-07-22 09:47:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978966086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654883888] [2022-07-22 09:47:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:09,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:09,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:09,962 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) [2022-07-22 09:47:09,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:47:10,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 09:47:10,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:10,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 09:47:10,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654883888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:10,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:10,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-22 09:47:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753191546] [2022-07-22 09:47:10,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:10,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:47:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:47:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:47:10,318 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:10,506 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-07-22 09:47:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:47:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-22 09:47:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:10,508 INFO L225 Difference]: With dead ends: 104 [2022-07-22 09:47:10,508 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 09:47:10,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:47:10,508 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:10,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 09:47:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-07-22 09:47:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 09:47:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-07-22 09:47:10,517 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2022-07-22 09:47:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:10,518 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-07-22 09:47:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-07-22 09:47:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 09:47:10,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:10,519 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:10,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:10,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2022-07-22 09:47:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261487137] [2022-07-22 09:47:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:10,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:10,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261487137] [2022-07-22 09:47:10,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261487137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:10,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300993615] [2022-07-22 09:47:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:10,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:10,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:10,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:47:10,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:47:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:10,964 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 16 treesize of output 12 [2022-07-22 09:47:11,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:47:11,034 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 29 treesize of output 28 [2022-07-22 09:47:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:47:11,107 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 24 treesize of output 23 [2022-07-22 09:47:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:47:11,158 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 24 treesize of output 23 [2022-07-22 09:47:11,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-07-22 09:47:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:47:11,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:11,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300993615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:11,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:47:11,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-22 09:47:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082540134] [2022-07-22 09:47:11,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:11,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:47:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:47:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:47:11,320 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-22 09:47:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:11,825 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-22 09:47:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:47:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2022-07-22 09:47:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:11,827 INFO L225 Difference]: With dead ends: 99 [2022-07-22 09:47:11,827 INFO L226 Difference]: Without dead ends: 97 [2022-07-22 09:47:11,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:47:11,828 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:11,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 336 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 393 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-22 09:47:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-22 09:47:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-07-22 09:47:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 09:47:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-22 09:47:11,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2022-07-22 09:47:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:11,836 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-22 09:47:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-22 09:47:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-22 09:47:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 09:47:11,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:11,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:11,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:12,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2022-07-22 09:47:12,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733215000] [2022-07-22 09:47:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:12,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733215000] [2022-07-22 09:47:12,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733215000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114461258] [2022-07-22 09:47:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:12,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:12,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:12,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:47:12,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:47:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:12,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:47:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:12,228 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 16 treesize of output 12 [2022-07-22 09:47:12,246 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:47:12,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:47:12,293 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:47:12,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:47:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:12,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:12,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:12,347 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 30 treesize of output 26 [2022-07-22 09:47:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114461258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:12,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-07-22 09:47:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401287351] [2022-07-22 09:47:12,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:47:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:47:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:47:12,375 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 09:47:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:12,579 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2022-07-22 09:47:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:47:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-07-22 09:47:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:12,580 INFO L225 Difference]: With dead ends: 158 [2022-07-22 09:47:12,580 INFO L226 Difference]: Without dead ends: 156 [2022-07-22 09:47:12,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:47:12,581 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:12,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-22 09:47:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-07-22 09:47:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 09:47:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-22 09:47:12,600 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2022-07-22 09:47:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:12,600 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-22 09:47:12,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 09:47:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-22 09:47:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 09:47:12,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:12,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:12,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2022-07-22 09:47:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:12,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083728336] [2022-07-22 09:47:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:12,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083728336] [2022-07-22 09:47:12,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083728336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026840371] [2022-07-22 09:47:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:12,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:12,947 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:12,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:47:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:47:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:13,085 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 16 treesize of output 12 [2022-07-22 09:47:13,141 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:47:13,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:47:13,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 09:47:13,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:13,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:13,348 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 36 treesize of output 32 [2022-07-22 09:47:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:13,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026840371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:13,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:13,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-07-22 09:47:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270392278] [2022-07-22 09:47:13,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:47:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:47:13,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:47:13,433 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-22 09:47:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:14,266 INFO L93 Difference]: Finished difference Result 250 states and 333 transitions. [2022-07-22 09:47:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 09:47:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2022-07-22 09:47:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:14,269 INFO L225 Difference]: With dead ends: 250 [2022-07-22 09:47:14,269 INFO L226 Difference]: Without dead ends: 248 [2022-07-22 09:47:14,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=2950, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:47:14,272 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:14,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 539 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 613 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-07-22 09:47:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-22 09:47:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2022-07-22 09:47:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 100 states have (on average 1.32) internal successors, (132), 100 states have internal predecessors, (132), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 09:47:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2022-07-22 09:47:14,297 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 47 [2022-07-22 09:47:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:14,297 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2022-07-22 09:47:14,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-22 09:47:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2022-07-22 09:47:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 09:47:14,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:14,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:14,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 09:47:14,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2022-07-22 09:47:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524580440] [2022-07-22 09:47:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:14,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:14,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524580440] [2022-07-22 09:47:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524580440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772015960] [2022-07-22 09:47:14,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:14,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:14,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:14,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:14,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:47:14,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:47:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:14,842 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 13 treesize of output 9 [2022-07-22 09:47:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:14,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:14,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:14,974 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 30 treesize of output 26 [2022-07-22 09:47:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:14,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772015960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:14,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-22 09:47:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018640603] [2022-07-22 09:47:14,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:47:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:47:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:47:15,001 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:47:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:15,602 INFO L93 Difference]: Finished difference Result 392 states and 563 transitions. [2022-07-22 09:47:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 09:47:15,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-22 09:47:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:15,608 INFO L225 Difference]: With dead ends: 392 [2022-07-22 09:47:15,608 INFO L226 Difference]: Without dead ends: 390 [2022-07-22 09:47:15,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:47:15,609 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 94 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:15,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 511 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:47:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-22 09:47:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 221. [2022-07-22 09:47:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 172 states have (on average 1.3546511627906976) internal successors, (233), 172 states have internal predecessors, (233), 43 states have call successors, (43), 5 states have call predecessors, (43), 5 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-07-22 09:47:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 319 transitions. [2022-07-22 09:47:15,653 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 319 transitions. Word has length 51 [2022-07-22 09:47:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:15,653 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 319 transitions. [2022-07-22 09:47:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:47:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 319 transitions. [2022-07-22 09:47:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 09:47:15,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:15,655 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:15,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 09:47:15,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2022-07-22 09:47:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066663809] [2022-07-22 09:47:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066663809] [2022-07-22 09:47:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066663809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577456549] [2022-07-22 09:47:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:16,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:16,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:16,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:47:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:47:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:16,197 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 13 treesize of output 9 [2022-07-22 09:47:16,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:16,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:16,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:16,432 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 36 treesize of output 32 [2022-07-22 09:47:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:16,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577456549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:16,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:16,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-22 09:47:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184477578] [2022-07-22 09:47:16,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:16,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 09:47:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 09:47:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:47:16,536 INFO L87 Difference]: Start difference. First operand 221 states and 319 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:47:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:18,393 INFO L93 Difference]: Finished difference Result 655 states and 956 transitions. [2022-07-22 09:47:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 09:47:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 51 [2022-07-22 09:47:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:18,396 INFO L225 Difference]: With dead ends: 655 [2022-07-22 09:47:18,396 INFO L226 Difference]: Without dead ends: 653 [2022-07-22 09:47:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 09:47:18,397 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 281 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:18,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 759 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 09:47:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-07-22 09:47:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 143. [2022-07-22 09:47:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 09:47:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 193 transitions. [2022-07-22 09:47:18,422 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 193 transitions. Word has length 51 [2022-07-22 09:47:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:18,423 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 193 transitions. [2022-07-22 09:47:18,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:47:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 193 transitions. [2022-07-22 09:47:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 09:47:18,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:18,424 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:18,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:18,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 09:47:18,632 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2022-07-22 09:47:18,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:18,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960115716] [2022-07-22 09:47:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:18,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960115716] [2022-07-22 09:47:18,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960115716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080327611] [2022-07-22 09:47:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:47:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:18,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:18,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:47:18,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 09:47:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:47:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:19,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:19,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080327611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:19,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:19,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-22 09:47:19,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480395976] [2022-07-22 09:47:19,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:19,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:47:19,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:47:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 09:47:19,451 INFO L87 Difference]: Start difference. First operand 143 states and 193 transitions. Second operand has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:47:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:19,722 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2022-07-22 09:47:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:47:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 55 [2022-07-22 09:47:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:19,724 INFO L225 Difference]: With dead ends: 219 [2022-07-22 09:47:19,724 INFO L226 Difference]: Without dead ends: 195 [2022-07-22 09:47:19,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 09:47:19,725 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 215 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:19,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 137 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:47:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-22 09:47:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 157. [2022-07-22 09:47:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 126 states have internal predecessors, (159), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 09:47:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-07-22 09:47:19,746 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 55 [2022-07-22 09:47:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:19,747 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-07-22 09:47:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 09:47:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-07-22 09:47:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 09:47:19,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:19,748 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:19,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 09:47:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:47:19,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 2 times [2022-07-22 09:47:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919840941] [2022-07-22 09:47:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:19,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:20,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919840941] [2022-07-22 09:47:20,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919840941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327121164] [2022-07-22 09:47:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:20,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:20,127 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:20,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:47:20,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:20,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:20,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:47:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:20,285 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 16 treesize of output 12 [2022-07-22 09:47:20,354 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:47:20,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:47:20,438 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:47:20,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:47:20,486 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:47:20,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:47:20,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 09:47:20,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327121164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:22,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:47:22,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-22 09:47:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189729439] [2022-07-22 09:47:22,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:47:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:47:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=602, Unknown=1, NotChecked=0, Total=702 [2022-07-22 09:47:22,806 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-22 09:47:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:23,582 INFO L93 Difference]: Finished difference Result 202 states and 259 transitions. [2022-07-22 09:47:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 09:47:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 61 [2022-07-22 09:47:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:23,583 INFO L225 Difference]: With dead ends: 202 [2022-07-22 09:47:23,583 INFO L226 Difference]: Without dead ends: 200 [2022-07-22 09:47:23,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=403, Invalid=2458, Unknown=1, NotChecked=0, Total=2862 [2022-07-22 09:47:23,585 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 164 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:23,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 498 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 653 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-07-22 09:47:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-22 09:47:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 101. [2022-07-22 09:47:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 09:47:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-07-22 09:47:23,600 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 61 [2022-07-22 09:47:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:23,601 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-07-22 09:47:23,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-22 09:47:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-07-22 09:47:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:47:23,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:23,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:23,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:23,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:47:23,805 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2022-07-22 09:47:23,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131484965] [2022-07-22 09:47:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:23,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:23,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131484965] [2022-07-22 09:47:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131484965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741446808] [2022-07-22 09:47:23,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:47:23,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:23,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:23,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:47:24,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:47:24,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:47:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:24,099 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 16 treesize of output 12 [2022-07-22 09:47:24,120 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:47:24,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:47:24,227 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:47:24,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:47:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:24,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:24,320 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 30 treesize of output 26 [2022-07-22 09:47:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:24,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741446808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:24,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:24,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-22 09:47:24,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022045895] [2022-07-22 09:47:24,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:24,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 09:47:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 09:47:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-22 09:47:24,365 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 09:47:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:25,056 INFO L93 Difference]: Finished difference Result 552 states and 806 transitions. [2022-07-22 09:47:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 09:47:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 69 [2022-07-22 09:47:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:25,058 INFO L225 Difference]: With dead ends: 552 [2022-07-22 09:47:25,059 INFO L226 Difference]: Without dead ends: 550 [2022-07-22 09:47:25,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:47:25,061 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 116 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:25,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 499 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:47:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-22 09:47:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 163. [2022-07-22 09:47:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.3046875) internal successors, (167), 128 states have internal predecessors, (167), 29 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 09:47:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-07-22 09:47:25,096 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 69 [2022-07-22 09:47:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:25,097 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-07-22 09:47:25,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-22 09:47:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-07-22 09:47:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:47:25,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:25,098 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:25,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 09:47:25,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 09:47:25,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 3 times [2022-07-22 09:47:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:25,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640980169] [2022-07-22 09:47:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:25,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640980169] [2022-07-22 09:47:25,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640980169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:25,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537476481] [2022-07-22 09:47:25,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:25,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:25,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:25,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:25,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:47:25,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:47:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:47:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:25,731 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 16 treesize of output 12 [2022-07-22 09:47:25,794 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:47:25,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:47:25,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 09:47:26,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:28,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:28,198 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 36 treesize of output 32 [2022-07-22 09:47:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537476481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:28,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:28,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-07-22 09:47:28,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688771562] [2022-07-22 09:47:28,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:28,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 09:47:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 09:47:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1117, Unknown=1, NotChecked=0, Total=1260 [2022-07-22 09:47:28,319 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 09:47:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:33,069 INFO L93 Difference]: Finished difference Result 785 states and 1137 transitions. [2022-07-22 09:47:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-22 09:47:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) Word has length 69 [2022-07-22 09:47:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:33,073 INFO L225 Difference]: With dead ends: 785 [2022-07-22 09:47:33,073 INFO L226 Difference]: Without dead ends: 783 [2022-07-22 09:47:33,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1173, Invalid=10814, Unknown=3, NotChecked=0, Total=11990 [2022-07-22 09:47:33,076 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 375 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:33,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1050 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 2267 Invalid, 0 Unknown, 169 Unchecked, 1.1s Time] [2022-07-22 09:47:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-07-22 09:47:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 196. [2022-07-22 09:47:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 09:47:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-07-22 09:47:33,119 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 69 [2022-07-22 09:47:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:33,119 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-07-22 09:47:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-22 09:47:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-07-22 09:47:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 09:47:33,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:33,120 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:33,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:33,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2022-07-22 09:47:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816535083] [2022-07-22 09:47:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:33,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816535083] [2022-07-22 09:47:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816535083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249688393] [2022-07-22 09:47:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:47:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:33,512 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:33,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:47:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:33,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 09:47:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:33,620 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 16 treesize of output 12 [2022-07-22 09:47:33,760 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:47:33,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:47:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:33,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:33,823 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 30 treesize of output 26 [2022-07-22 09:47:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249688393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:33,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:33,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-22 09:47:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327593366] [2022-07-22 09:47:33,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:33,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:47:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:47:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:47:33,869 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:36,164 INFO L93 Difference]: Finished difference Result 1725 states and 2618 transitions. [2022-07-22 09:47:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-22 09:47:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-07-22 09:47:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:36,170 INFO L225 Difference]: With dead ends: 1725 [2022-07-22 09:47:36,170 INFO L226 Difference]: Without dead ends: 1723 [2022-07-22 09:47:36,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:47:36,172 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 153 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:36,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 983 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 09:47:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-07-22 09:47:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 406. [2022-07-22 09:47:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 314 states have (on average 1.375796178343949) internal successors, (432), 314 states have internal predecessors, (432), 83 states have call successors, (83), 8 states have call predecessors, (83), 8 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-22 09:47:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 598 transitions. [2022-07-22 09:47:36,298 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 598 transitions. Word has length 73 [2022-07-22 09:47:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:36,299 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 598 transitions. [2022-07-22 09:47:36,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 09:47:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 598 transitions. [2022-07-22 09:47:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 09:47:36,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:36,302 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:36,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:36,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 09:47:36,518 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:36,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2022-07-22 09:47:36,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:36,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282801728] [2022-07-22 09:47:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:36,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282801728] [2022-07-22 09:47:36,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282801728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667958237] [2022-07-22 09:47:36,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:36,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:47:36,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:47:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:36,854 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 13 treesize of output 9 [2022-07-22 09:47:36,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:37,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:37,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:37,177 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 36 treesize of output 32 [2022-07-22 09:47:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:37,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667958237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:37,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:37,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-22 09:47:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866173454] [2022-07-22 09:47:37,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:37,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:47:37,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:47:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:47:37,320 INFO L87 Difference]: Start difference. First operand 406 states and 598 transitions. Second operand has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 09:47:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:43,416 INFO L93 Difference]: Finished difference Result 2914 states and 4463 transitions. [2022-07-22 09:47:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-07-22 09:47:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 73 [2022-07-22 09:47:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:43,425 INFO L225 Difference]: With dead ends: 2914 [2022-07-22 09:47:43,425 INFO L226 Difference]: Without dead ends: 2912 [2022-07-22 09:47:43,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13039 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4261, Invalid=30521, Unknown=0, NotChecked=0, Total=34782 [2022-07-22 09:47:43,430 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 422 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 4523 mSolverCounterSat, 1111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 4523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:43,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1638 Invalid, 5634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 4523 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 09:47:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-07-22 09:47:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 218. [2022-07-22 09:47:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 174 states have internal predecessors, (223), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 09:47:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2022-07-22 09:47:43,520 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 73 [2022-07-22 09:47:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:43,521 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2022-07-22 09:47:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 09:47:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2022-07-22 09:47:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 09:47:43,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:43,522 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:43,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 09:47:43,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2022-07-22 09:47:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:43,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318918535] [2022-07-22 09:47:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318918535] [2022-07-22 09:47:44,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318918535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196332537] [2022-07-22 09:47:44,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:47:44,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:44,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:44,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:44,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:47:44,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:47:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:47:44,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:44,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 09:47:44,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196332537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:44,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:44,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-07-22 09:47:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004333340] [2022-07-22 09:47:44,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 09:47:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 09:47:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:47:44,864 INFO L87 Difference]: Start difference. First operand 218 states and 293 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 09:47:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:45,250 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2022-07-22 09:47:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:47:45,251 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 77 [2022-07-22 09:47:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:45,252 INFO L225 Difference]: With dead ends: 298 [2022-07-22 09:47:45,252 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 09:47:45,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 09:47:45,253 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:45,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 172 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:47:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 09:47:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-07-22 09:47:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.2634408602150538) internal successors, (235), 186 states have internal predecessors, (235), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-22 09:47:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2022-07-22 09:47:45,323 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 77 [2022-07-22 09:47:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:45,323 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2022-07-22 09:47:45,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 09:47:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2022-07-22 09:47:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 09:47:45,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:45,324 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:45,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:45,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 09:47:45,549 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2022-07-22 09:47:45,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:45,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175148085] [2022-07-22 09:47:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:47:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:47:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:47:45,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175148085] [2022-07-22 09:47:45,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175148085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960570901] [2022-07-22 09:47:45,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:47:45,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:45,711 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:45,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:47:45,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 09:47:45,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:45,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 09:47:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:45,927 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 16 treesize of output 12 [2022-07-22 09:47:45,949 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:47:45,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-22 09:47:46,114 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:47:46,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:47:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:47:46,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:46,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:47:46,200 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 30 treesize of output 26 [2022-07-22 09:47:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:47:46,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960570901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:46,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:46,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-22 09:47:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453989548] [2022-07-22 09:47:46,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:47:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:47:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:47:46,257 INFO L87 Difference]: Start difference. First operand 233 states and 311 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 09:47:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:47:51,103 INFO L93 Difference]: Finished difference Result 3600 states and 5511 transitions. [2022-07-22 09:47:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-07-22 09:47:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 91 [2022-07-22 09:47:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:47:51,114 INFO L225 Difference]: With dead ends: 3600 [2022-07-22 09:47:51,115 INFO L226 Difference]: Without dead ends: 3598 [2022-07-22 09:47:51,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8629 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2022-07-22 09:47:51,117 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 215 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 4621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:47:51,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1577 Invalid, 4621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 09:47:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-22 09:47:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 458. [2022-07-22 09:47:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 360 states have (on average 1.3472222222222223) internal successors, (485), 360 states have internal predecessors, (485), 89 states have call successors, (89), 8 states have call predecessors, (89), 8 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-22 09:47:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 663 transitions. [2022-07-22 09:47:51,428 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 663 transitions. Word has length 91 [2022-07-22 09:47:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:47:51,429 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 663 transitions. [2022-07-22 09:47:51,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 09:47:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 663 transitions. [2022-07-22 09:47:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 09:47:51,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:47:51,431 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:47:51,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 09:47:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:51,631 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:47:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:47:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 4 times [2022-07-22 09:47:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:47:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384071559] [2022-07-22 09:47:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:47:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:47:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:47:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:47:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:47:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:47:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:47:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:47:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:47:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:47:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:47:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:47:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:47:51,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384071559] [2022-07-22 09:47:51,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384071559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:47:51,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741144953] [2022-07-22 09:47:51,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:47:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:47:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:47:51,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:47:51,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 09:47:51,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:47:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:47:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:47:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:47:52,111 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 16 treesize of output 12 [2022-07-22 09:47:52,186 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:47:52,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:47:52,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:47:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 09:47:52,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:47:54,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:47:54,687 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 36 treesize of output 32 [2022-07-22 09:47:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:47:54,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741144953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:47:54,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:47:54,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2022-07-22 09:47:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51600467] [2022-07-22 09:47:54,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:47:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:47:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:47:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:47:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1814, Unknown=1, NotChecked=0, Total=1980 [2022-07-22 09:47:54,871 INFO L87 Difference]: Start difference. First operand 458 states and 663 transitions. Second operand has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2022-07-22 09:48:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:40,113 INFO L93 Difference]: Finished difference Result 4291 states and 6592 transitions. [2022-07-22 09:48:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-07-22 09:48:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) Word has length 91 [2022-07-22 09:48:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:40,127 INFO L225 Difference]: With dead ends: 4291 [2022-07-22 09:48:40,127 INFO L226 Difference]: Without dead ends: 4289 [2022-07-22 09:48:40,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22804 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=4243, Invalid=51670, Unknown=19, NotChecked=0, Total=55932 [2022-07-22 09:48:40,132 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 805 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 8230 mSolverCounterSat, 1340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 3029 SdHoareTripleChecker+Invalid, 10030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1340 IncrementalHoareTripleChecker+Valid, 8230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:40,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 3029 Invalid, 10030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1340 Valid, 8230 Invalid, 0 Unknown, 460 Unchecked, 3.5s Time] [2022-07-22 09:48:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-07-22 09:48:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 515. [2022-07-22 09:48:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 402 states have (on average 1.355721393034826) internal successors, (545), 402 states have internal predecessors, (545), 101 states have call successors, (101), 11 states have call predecessors, (101), 11 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-22 09:48:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 747 transitions. [2022-07-22 09:48:40,383 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 747 transitions. Word has length 91 [2022-07-22 09:48:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:40,383 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 747 transitions. [2022-07-22 09:48:40,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2022-07-22 09:48:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 747 transitions. [2022-07-22 09:48:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 09:48:40,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:40,385 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:40,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 09:48:40,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:40,599 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2022-07-22 09:48:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:40,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644842873] [2022-07-22 09:48:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:40,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:48:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:48:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:48:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:48:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:48:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:48:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644842873] [2022-07-22 09:48:40,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644842873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323694742] [2022-07-22 09:48:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:48:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:40,788 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:40,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 09:48:40,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:48:40,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:48:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:40,917 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 16 treesize of output 12 [2022-07-22 09:48:41,120 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:48:41,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-22 09:48:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:41,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:41,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2022-07-22 09:48:41,240 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 30 treesize of output 26 [2022-07-22 09:48:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323694742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:41,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2022-07-22 09:48:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482590573] [2022-07-22 09:48:41,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:41,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:48:41,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:48:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:48:41,318 INFO L87 Difference]: Start difference. First operand 515 states and 747 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:48:53,281 INFO L93 Difference]: Finished difference Result 13194 states and 20561 transitions. [2022-07-22 09:48:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-07-22 09:48:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-07-22 09:48:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:48:53,318 INFO L225 Difference]: With dead ends: 13194 [2022-07-22 09:48:53,318 INFO L226 Difference]: Without dead ends: 13192 [2022-07-22 09:48:53,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32123 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2022-07-22 09:48:53,326 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 491 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 6244 mSolverCounterSat, 1493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 7737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1493 IncrementalHoareTripleChecker+Valid, 6244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:48:53,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 2110 Invalid, 7737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1493 Valid, 6244 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 09:48:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13192 states. [2022-07-22 09:48:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13192 to 1197. [2022-07-22 09:48:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 922 states have (on average 1.411062906724512) internal successors, (1301), 922 states have internal predecessors, (1301), 263 states have call successors, (263), 11 states have call predecessors, (263), 11 states have return successors, (263), 263 states have call predecessors, (263), 263 states have call successors, (263) [2022-07-22 09:48:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1827 transitions. [2022-07-22 09:48:54,110 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1827 transitions. Word has length 95 [2022-07-22 09:48:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:48:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1827 transitions. [2022-07-22 09:48:54,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 09:48:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1827 transitions. [2022-07-22 09:48:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 09:48:54,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:48:54,113 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:48:54,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 09:48:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 09:48:54,330 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:48:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:48:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2022-07-22 09:48:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:48:54,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357965063] [2022-07-22 09:48:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:48:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:48:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:48:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:48:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:48:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:48:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:48:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:48:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:48:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:48:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:48:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:54,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:48:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357965063] [2022-07-22 09:48:54,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357965063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:48:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85855095] [2022-07-22 09:48:54,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:48:54,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:48:54,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:48:54,521 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:48:54,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 09:48:54,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 09:48:54,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:48:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:48:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:48:54,948 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 13 treesize of output 9 [2022-07-22 09:48:55,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:48:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:55,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:48:55,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:48:55,440 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 36 treesize of output 32 [2022-07-22 09:48:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:48:55,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85855095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:48:55,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:48:55,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-22 09:48:55,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379844629] [2022-07-22 09:48:55,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:48:55,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:48:55,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:48:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:48:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:48:55,635 INFO L87 Difference]: Start difference. First operand 1197 states and 1827 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-22 09:49:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:26,812 INFO L93 Difference]: Finished difference Result 19816 states and 30987 transitions. [2022-07-22 09:49:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 501 states. [2022-07-22 09:49:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 95 [2022-07-22 09:49:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:26,902 INFO L225 Difference]: With dead ends: 19816 [2022-07-22 09:49:26,915 INFO L226 Difference]: Without dead ends: 19814 [2022-07-22 09:49:26,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134163 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=26098, Invalid=268208, Unknown=0, NotChecked=0, Total=294306 [2022-07-22 09:49:26,950 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 1029 mSDsluCounter, 3218 mSDsCounter, 0 mSdLazyCounter, 13225 mSolverCounterSat, 5292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 3791 SdHoareTripleChecker+Invalid, 18517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5292 IncrementalHoareTripleChecker+Valid, 13225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:26,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 3791 Invalid, 18517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5292 Valid, 13225 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-22 09:49:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19814 states. [2022-07-22 09:49:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19814 to 545. [2022-07-22 09:49:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 432 states have (on average 1.3333333333333333) internal successors, (576), 432 states have internal predecessors, (576), 101 states have call successors, (101), 11 states have call predecessors, (101), 11 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-22 09:49:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 778 transitions. [2022-07-22 09:49:27,774 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 778 transitions. Word has length 95 [2022-07-22 09:49:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:27,774 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 778 transitions. [2022-07-22 09:49:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-22 09:49:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 778 transitions. [2022-07-22 09:49:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 09:49:27,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:27,776 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:27,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 09:49:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 09:49:27,987 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1499687394, now seen corresponding path program 5 times [2022-07-22 09:49:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342826427] [2022-07-22 09:49:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:49:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:49:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:49:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:49:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:49:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:49:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:49:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:49:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 09:49:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 09:49:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-22 09:49:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342826427] [2022-07-22 09:49:28,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342826427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530691778] [2022-07-22 09:49:28,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:49:28,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:28,214 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:28,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 09:49:28,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-22 09:49:28,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:49:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:28,477 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 16 treesize of output 12 [2022-07-22 09:49:28,543 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:49:28,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:49:28,619 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:49:28,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:49:28,671 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:49:28,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:49:28,747 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:49:28,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:49:28,800 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:49:28,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:49:28,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 09:49:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 09:49:28,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:31,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530691778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:31,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:49:31,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-22 09:49:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160383130] [2022-07-22 09:49:31,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:31,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 09:49:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 09:49:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1171, Unknown=2, NotChecked=0, Total=1332 [2022-07-22 09:49:31,672 INFO L87 Difference]: Start difference. First operand 545 states and 778 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-22 09:49:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:33,088 INFO L93 Difference]: Finished difference Result 668 states and 925 transitions. [2022-07-22 09:49:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 09:49:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) Word has length 97 [2022-07-22 09:49:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:33,091 INFO L225 Difference]: With dead ends: 668 [2022-07-22 09:49:33,091 INFO L226 Difference]: Without dead ends: 666 [2022-07-22 09:49:33,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=524, Invalid=4304, Unknown=2, NotChecked=0, Total=4830 [2022-07-22 09:49:33,092 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 216 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:33,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 746 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1107 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-07-22 09:49:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-07-22 09:49:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 339. [2022-07-22 09:49:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.3022388059701493) internal successors, (349), 268 states have internal predecessors, (349), 59 states have call successors, (59), 11 states have call predecessors, (59), 11 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-07-22 09:49:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 467 transitions. [2022-07-22 09:49:33,369 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 467 transitions. Word has length 97 [2022-07-22 09:49:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:33,369 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 467 transitions. [2022-07-22 09:49:33,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-22 09:49:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 467 transitions. [2022-07-22 09:49:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 09:49:33,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:33,371 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:33,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:33,588 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2022-07-22 09:49:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901387106] [2022-07-22 09:49:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:49:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:49:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:49:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:49:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:49:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:49:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:49:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:49:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:49:34,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:34,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901387106] [2022-07-22 09:49:34,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901387106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:34,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397451278] [2022-07-22 09:49:34,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:49:34,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:34,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:34,002 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:34,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 09:49:34,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-22 09:49:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:49:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:49:34,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 09:49:35,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397451278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:35,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:35,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-22 09:49:35,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362936725] [2022-07-22 09:49:35,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:35,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:49:35,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:35,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:49:35,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:49:35,046 INFO L87 Difference]: Start difference. First operand 339 states and 467 transitions. Second operand has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-22 09:49:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:49:35,687 INFO L93 Difference]: Finished difference Result 427 states and 583 transitions. [2022-07-22 09:49:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:49:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 99 [2022-07-22 09:49:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:49:35,689 INFO L225 Difference]: With dead ends: 427 [2022-07-22 09:49:35,689 INFO L226 Difference]: Without dead ends: 387 [2022-07-22 09:49:35,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 09:49:35,690 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 326 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:49:35,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 223 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:49:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-22 09:49:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 359. [2022-07-22 09:49:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 284 states have (on average 1.2852112676056338) internal successors, (365), 284 states have internal predecessors, (365), 63 states have call successors, (63), 11 states have call predecessors, (63), 11 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-07-22 09:49:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 491 transitions. [2022-07-22 09:49:36,003 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 491 transitions. Word has length 99 [2022-07-22 09:49:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:49:36,003 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 491 transitions. [2022-07-22 09:49:36,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-22 09:49:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 491 transitions. [2022-07-22 09:49:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 09:49:36,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:49:36,005 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:49:36,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 09:49:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:36,209 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:49:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:49:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2022-07-22 09:49:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:49:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073580676] [2022-07-22 09:49:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:49:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:49:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 09:49:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 09:49:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:49:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:49:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 09:49:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:49:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 09:49:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:49:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 09:49:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 09:49:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:49:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-22 09:49:36,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:49:36,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073580676] [2022-07-22 09:49:36,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073580676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:49:36,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135193735] [2022-07-22 09:49:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:49:36,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:49:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:49:36,424 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:49:36,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 09:49:36,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-22 09:49:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:49:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 09:49:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:49:36,819 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 16 treesize of output 12 [2022-07-22 09:49:50,941 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:49:50,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:49:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 09:49:51,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:49:53,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 16 [2022-07-22 09:49:53,409 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 36 treesize of output 32 [2022-07-22 09:49:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-22 09:49:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135193735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:49:53,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:49:53,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 39 [2022-07-22 09:49:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086034905] [2022-07-22 09:49:53,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:49:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:49:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:49:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:49:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1319, Unknown=8, NotChecked=0, Total=1482 [2022-07-22 09:49:53,514 INFO L87 Difference]: Start difference. First operand 359 states and 491 transitions. Second operand has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 13 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21)