./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/loops-crafted-1/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:13:16,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:13:16,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:13:16,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:13:16,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:13:16,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:13:16,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:13:16,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:13:16,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:13:16,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:13:16,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:13:16,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:13:16,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:13:16,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:13:16,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:13:16,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:13:16,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:13:16,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:13:16,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:13:16,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:13:16,821 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:13:16,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:13:16,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:13:16,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:13:16,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:13:16,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:13:16,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:13:16,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:13:16,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:13:16,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:13:16,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:13:16,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:13:16,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:13:16,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:13:16,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:13:16,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:13:16,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:13:16,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:13:16,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:13:16,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:13:16,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:13:16,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:13:16,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:13:16,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:13:16,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:13:16,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:13:16,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:13:16,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:13:16,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:13:16,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:13:16,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:13:16,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:13:16,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:13:16,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:13:16,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:13:16,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:13:16,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:13:16,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:13:16,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:13:16,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:13:16,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:13:16,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:13:16,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:13:16,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:13:16,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:13:16,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:13:16,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:13:16,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:13:16,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:13:16,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:13:16,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:13:16,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:13:16,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:13:16,880 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:13:16,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:13:16,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:13:16,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2022-07-12 04:13:17,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:13:17,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:13:17,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:13:17,133 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:13:17,134 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:13:17,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-07-12 04:13:17,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c9a241e/5696f7f31ff545b1857e5792e2a04122/FLAGd185f6419 [2022-07-12 04:13:17,536 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:13:17,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-07-12 04:13:17,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c9a241e/5696f7f31ff545b1857e5792e2a04122/FLAGd185f6419 [2022-07-12 04:13:17,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8c9a241e/5696f7f31ff545b1857e5792e2a04122 [2022-07-12 04:13:17,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:13:17,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:13:17,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:13:17,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:13:17,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:13:17,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a156967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17, skipping insertion in model container [2022-07-12 04:13:17,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:13:17,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:13:17,680 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/loops-crafted-1/theatreSquare.c[370,383] [2022-07-12 04:13:17,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:13:17,712 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:13:17,727 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/loops-crafted-1/theatreSquare.c[370,383] [2022-07-12 04:13:17,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:13:17,752 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:13:17,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17 WrapperNode [2022-07-12 04:13:17,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:13:17,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:13:17,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:13:17,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:13:17,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,784 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-07-12 04:13:17,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:13:17,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:13:17,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:13:17,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:13:17,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:13:17,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:13:17,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:13:17,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:13:17,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (1/1) ... [2022-07-12 04:13:17,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:13:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:17,852 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) [2022-07-12 04:13:17,858 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 [2022-07-12 04:13:17,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:13:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:13:17,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:13:17,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:13:17,924 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:13:17,925 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:13:18,053 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:13:18,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:13:18,058 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 04:13:18,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:13:18 BoogieIcfgContainer [2022-07-12 04:13:18,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:13:18,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:13:18,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:13:18,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:13:18,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:13:17" (1/3) ... [2022-07-12 04:13:18,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd6118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:13:18, skipping insertion in model container [2022-07-12 04:13:18,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:13:17" (2/3) ... [2022-07-12 04:13:18,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd6118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:13:18, skipping insertion in model container [2022-07-12 04:13:18,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:13:18" (3/3) ... [2022-07-12 04:13:18,084 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-07-12 04:13:18,094 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:13:18,095 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:13:18,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:13:18,147 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@6332828c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72258c17 [2022-07-12 04:13:18,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:13:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-07-12 04:13:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 04:13:18,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:18,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 04:13:18,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2022-07-12 04:13:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:18,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066242409] [2022-07-12 04:13:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:13:18,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066242409] [2022-07-12 04:13:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066242409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:18,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:18,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:13:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428897457] [2022-07-12 04:13:18,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:18,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:13:18,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:13:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:18,520 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 04:13:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:18,572 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2022-07-12 04:13:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:13:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-07-12 04:13:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:18,583 INFO L225 Difference]: With dead ends: 48 [2022-07-12 04:13:18,583 INFO L226 Difference]: Without dead ends: 19 [2022-07-12 04:13:18,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:13:18,593 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:18,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-12 04:13:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-12 04:13:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-07-12 04:13:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-12 04:13:18,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2022-07-12 04:13:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:18,618 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-12 04:13:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 04:13:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-12 04:13:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:13:18,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:18,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:18,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:13:18,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2022-07-12 04:13:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489094037] [2022-07-12 04:13:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:13:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489094037] [2022-07-12 04:13:18,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489094037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:18,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:18,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 04:13:18,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423646865] [2022-07-12 04:13:18,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:18,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:13:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:13:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:13:18,736 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2022-07-12 04:13:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:18,869 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-12 04:13:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:13:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 18 [2022-07-12 04:13:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:18,871 INFO L225 Difference]: With dead ends: 39 [2022-07-12 04:13:18,871 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 04:13:18,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:13:18,877 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:18,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 04:13:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-07-12 04:13:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-07-12 04:13:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-07-12 04:13:18,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2022-07-12 04:13:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-07-12 04:13:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2022-07-12 04:13:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-07-12 04:13:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:13:18,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:18,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:13:18,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2022-07-12 04:13:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:18,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20947404] [2022-07-12 04:13:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:13:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:18,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20947404] [2022-07-12 04:13:18,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20947404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:18,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:18,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:13:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511300480] [2022-07-12 04:13:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:18,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:13:18,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:18,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:13:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:18,939 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:18,952 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-07-12 04:13:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:13:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 04:13:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:18,955 INFO L225 Difference]: With dead ends: 47 [2022-07-12 04:13:18,955 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 04:13:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:18,956 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 04:13:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-07-12 04:13:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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) [2022-07-12 04:13:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-07-12 04:13:18,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2022-07-12 04:13:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:18,963 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-07-12 04:13:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-07-12 04:13:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:13:18,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:18,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:18,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 04:13:18,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2022-07-12 04:13:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558801600] [2022-07-12 04:13:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:13:19,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558801600] [2022-07-12 04:13:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558801600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:19,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:13:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929900660] [2022-07-12 04:13:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:13:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:13:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:19,004 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,012 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-07-12 04:13:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:13:19,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 04:13:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,013 INFO L225 Difference]: With dead ends: 66 [2022-07-12 04:13:19,013 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 04:13:19,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:19,014 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 04:13:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-07-12 04:13:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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) [2022-07-12 04:13:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-07-12 04:13:19,019 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2022-07-12 04:13:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,019 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-07-12 04:13:19,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-07-12 04:13:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 04:13:19,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 04:13:19,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2022-07-12 04:13:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516700017] [2022-07-12 04:13:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:19,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516700017] [2022-07-12 04:13:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516700017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:19,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:13:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641241476] [2022-07-12 04:13:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:13:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:13:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:13:19,064 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-07-12 04:13:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,072 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-07-12 04:13:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:13:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-07-12 04:13:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,073 INFO L225 Difference]: With dead ends: 65 [2022-07-12 04:13:19,074 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 04:13:19,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:13:19,075 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 04:13:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-12 04:13:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-07-12 04:13:19,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-07-12 04:13:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,085 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-07-12 04:13:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-07-12 04:13:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-07-12 04:13:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:13:19,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 04:13:19,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2031253980, now seen corresponding path program 1 times [2022-07-12 04:13:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091549709] [2022-07-12 04:13:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:13:19,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091549709] [2022-07-12 04:13:19,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091549709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:19,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:13:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482359385] [2022-07-12 04:13:19,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:13:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:13:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:13:19,145 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-07-12 04:13:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,149 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-12 04:13:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:13:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-07-12 04:13:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,151 INFO L225 Difference]: With dead ends: 51 [2022-07-12 04:13:19,151 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 04:13:19,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:13:19,152 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 04:13:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 04:13:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-12 04:13:19,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2022-07-12 04:13:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,157 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-12 04:13:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-07-12 04:13:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-12 04:13:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:13:19,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 04:13:19,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2022-07-12 04:13:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872208954] [2022-07-12 04:13:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:13:19,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872208954] [2022-07-12 04:13:19,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872208954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:13:19,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:13:19,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278427810] [2022-07-12 04:13:19,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:13:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:13:19,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:13:19,198 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-07-12 04:13:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,222 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-07-12 04:13:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:13:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 21 [2022-07-12 04:13:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,222 INFO L225 Difference]: With dead ends: 39 [2022-07-12 04:13:19,223 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 04:13:19,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:13:19,223 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 04:13:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-12 04:13:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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) [2022-07-12 04:13:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-12 04:13:19,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2022-07-12 04:13:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,227 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-12 04:13:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-07-12 04:13:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-12 04:13:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:13:19,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 04:13:19,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2022-07-12 04:13:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766872254] [2022-07-12 04:13:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:13:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766872254] [2022-07-12 04:13:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766872254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997038146] [2022-07-12 04:13:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:19,272 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) [2022-07-12 04:13:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:13:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:13:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:13:19,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:13:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997038146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:13:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-12 04:13:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917553351] [2022-07-12 04:13:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:13:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:13:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:13:19,366 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-07-12 04:13:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,374 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-12 04:13:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:13:19,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2022-07-12 04:13:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,376 INFO L225 Difference]: With dead ends: 37 [2022-07-12 04:13:19,379 INFO L226 Difference]: Without dead ends: 23 [2022-07-12 04:13:19,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:13:19,380 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-12 04:13:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-12 04:13:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-07-12 04:13:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-12 04:13:19,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2022-07-12 04:13:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,383 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-12 04:13:19,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2022-07-12 04:13:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-12 04:13:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:13:19,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 04:13:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:19,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2022-07-12 04:13:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979134009] [2022-07-12 04:13:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:13:19,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:19,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979134009] [2022-07-12 04:13:19,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979134009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:19,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829250842] [2022-07-12 04:13:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:19,678 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) [2022-07-12 04:13:19,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:13:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:13:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:19,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:13:19,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829250842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:19,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:13:19,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-12 04:13:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154289627] [2022-07-12 04:13:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:13:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:13:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:13:19,767 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-12 04:13:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:19,779 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-07-12 04:13:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:13:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2022-07-12 04:13:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:19,782 INFO L225 Difference]: With dead ends: 32 [2022-07-12 04:13:19,782 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 04:13:19,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:13:19,782 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:19,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 04:13:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-12 04:13:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-07-12 04:13:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-12 04:13:19,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2022-07-12 04:13:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:19,789 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-12 04:13:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-12 04:13:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-12 04:13:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 04:13:19,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:19,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:19,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:19,995 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,SelfDestructingSolverStorable8 [2022-07-12 04:13:19,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2022-07-12 04:13:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677351739] [2022-07-12 04:13:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:19,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677351739] [2022-07-12 04:13:20,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677351739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073471895] [2022-07-12 04:13:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:20,044 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) [2022-07-12 04:13:20,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:13:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:13:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:20,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:13:20,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073471895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:13:20,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:13:20,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-12 04:13:20,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765210168] [2022-07-12 04:13:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:13:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:13:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:13:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:13:20,103 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-07-12 04:13:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:20,112 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-12 04:13:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:13:20,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2022-07-12 04:13:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:20,114 INFO L225 Difference]: With dead ends: 31 [2022-07-12 04:13:20,114 INFO L226 Difference]: Without dead ends: 25 [2022-07-12 04:13:20,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:13:20,114 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:20,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-12 04:13:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-12 04:13:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-07-12 04:13:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-12 04:13:20,117 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2022-07-12 04:13:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:20,118 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-12 04:13:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-07-12 04:13:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-12 04:13:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 04:13:20,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:20,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:20,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:20,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:20,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2022-07-12 04:13:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064293548] [2022-07-12 04:13:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:20,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:20,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064293548] [2022-07-12 04:13:20,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064293548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:20,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385525686] [2022-07-12 04:13:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:20,497 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) [2022-07-12 04:13:20,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:13:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 04:13:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:20,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:20,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385525686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:20,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:20,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-07-12 04:13:20,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765601981] [2022-07-12 04:13:20,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:20,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:13:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:13:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:13:20,865 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2022-07-12 04:13:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:21,215 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-07-12 04:13:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 04:13:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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 24 [2022-07-12 04:13:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:21,217 INFO L225 Difference]: With dead ends: 77 [2022-07-12 04:13:21,217 INFO L226 Difference]: Without dead ends: 71 [2022-07-12 04:13:21,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:13:21,218 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 119 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:21,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 312 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-12 04:13:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2022-07-12 04:13:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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) [2022-07-12 04:13:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-07-12 04:13:21,226 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2022-07-12 04:13:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:21,227 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-07-12 04:13:21,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2022-07-12 04:13:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-07-12 04:13:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:13:21,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:21,228 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:21,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:21,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:21,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2022-07-12 04:13:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233238584] [2022-07-12 04:13:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:21,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233238584] [2022-07-12 04:13:21,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233238584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:21,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560585349] [2022-07-12 04:13:21,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:21,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:21,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:21,501 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) [2022-07-12 04:13:21,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:13:21,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:13:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:21,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560585349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:21,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:21,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-12 04:13:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261105656] [2022-07-12 04:13:21,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:13:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:13:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:13:21,653 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:21,711 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-07-12 04:13:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:13:21,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 04:13:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:21,712 INFO L225 Difference]: With dead ends: 63 [2022-07-12 04:13:21,712 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 04:13:21,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:13:21,713 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:21,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 117 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 04:13:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-07-12 04:13:21,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2022-07-12 04:13:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-07-12 04:13:21,734 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2022-07-12 04:13:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:21,735 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-07-12 04:13:21,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-07-12 04:13:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:13:21,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:21,737 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:21,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 04:13:21,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2022-07-12 04:13:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194631593] [2022-07-12 04:13:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:21,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194631593] [2022-07-12 04:13:21,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194631593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966389301] [2022-07-12 04:13:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:21,994 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) [2022-07-12 04:13:21,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:13:22,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:13:22,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:13:22,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966389301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:22,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:22,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-12 04:13:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028694421] [2022-07-12 04:13:22,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:22,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:13:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:13:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:13:22,091 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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) [2022-07-12 04:13:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:22,111 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-07-12 04:13:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:13:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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 25 [2022-07-12 04:13:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:22,113 INFO L225 Difference]: With dead ends: 72 [2022-07-12 04:13:22,114 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 04:13:22,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:13:22,114 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:22,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 04:13:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-12 04:13:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 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) [2022-07-12 04:13:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-12 04:13:22,129 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2022-07-12 04:13:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:22,129 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-12 04:13:22,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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) [2022-07-12 04:13:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-12 04:13:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:13:22,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:22,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:22,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:22,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:22,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2022-07-12 04:13:22,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:22,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104847120] [2022-07-12 04:13:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:22,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104847120] [2022-07-12 04:13:22,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104847120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:22,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460379651] [2022-07-12 04:13:22,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:22,385 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) [2022-07-12 04:13:22,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:13:22,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:22,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:22,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:13:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460379651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:22,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:22,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-12 04:13:22,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158879895] [2022-07-12 04:13:22,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:22,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:13:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:13:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:13:22,468 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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) [2022-07-12 04:13:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:22,491 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2022-07-12 04:13:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:13:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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 25 [2022-07-12 04:13:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:22,493 INFO L225 Difference]: With dead ends: 126 [2022-07-12 04:13:22,493 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 04:13:22,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:13:22,494 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:22,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 04:13:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2022-07-12 04:13:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 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) [2022-07-12 04:13:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-07-12 04:13:22,507 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2022-07-12 04:13:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:22,507 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-07-12 04:13:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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) [2022-07-12 04:13:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-07-12 04:13:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:13:22,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:22,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:22,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:22,725 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2022-07-12 04:13:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:22,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853368927] [2022-07-12 04:13:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853368927] [2022-07-12 04:13:22,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853368927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955786739] [2022-07-12 04:13:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:22,815 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) [2022-07-12 04:13:22,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:13:22,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:22,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:13:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:22,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955786739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:22,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:22,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-12 04:13:22,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291160425] [2022-07-12 04:13:22,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:22,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:13:22,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:13:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:13:22,981 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:23,058 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-07-12 04:13:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:13:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 04:13:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:23,059 INFO L225 Difference]: With dead ends: 90 [2022-07-12 04:13:23,059 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 04:13:23,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:13:23,062 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:23,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 214 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 04:13:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-07-12 04:13:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 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) [2022-07-12 04:13:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-07-12 04:13:23,072 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2022-07-12 04:13:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:23,072 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-07-12 04:13:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-07-12 04:13:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:13:23,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:23,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:23,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:23,291 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,SelfDestructingSolverStorable14 [2022-07-12 04:13:23,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2022-07-12 04:13:23,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:23,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763581773] [2022-07-12 04:13:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 04:13:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763581773] [2022-07-12 04:13:23,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763581773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:23,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532800108] [2022-07-12 04:13:23,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:23,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:23,356 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) [2022-07-12 04:13:23,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:13:23,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 04:13:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:13:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:23,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532800108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:23,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:23,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-12 04:13:23,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851174262] [2022-07-12 04:13:23,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:23,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:13:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:13:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:13:23,520 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-12 04:13:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:23,632 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-07-12 04:13:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:13:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 26 [2022-07-12 04:13:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:23,633 INFO L225 Difference]: With dead ends: 104 [2022-07-12 04:13:23,633 INFO L226 Difference]: Without dead ends: 79 [2022-07-12 04:13:23,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:13:23,633 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:23,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 137 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-12 04:13:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-07-12 04:13:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 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) [2022-07-12 04:13:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-07-12 04:13:23,643 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2022-07-12 04:13:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:23,644 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-07-12 04:13:23,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-12 04:13:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-07-12 04:13:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:13:23,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:23,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:23,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:23,851 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,SelfDestructingSolverStorable15 [2022-07-12 04:13:23,851 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2022-07-12 04:13:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109580308] [2022-07-12 04:13:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:24,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109580308] [2022-07-12 04:13:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109580308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134212978] [2022-07-12 04:13:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:24,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:24,020 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) [2022-07-12 04:13:24,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:13:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 04:13:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:24,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:24,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134212978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:24,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:24,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2022-07-12 04:13:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92494180] [2022-07-12 04:13:24,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 04:13:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 04:13:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-07-12 04:13:24,361 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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) [2022-07-12 04:13:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:24,792 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-07-12 04:13:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 04:13:24,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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 26 [2022-07-12 04:13:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:24,793 INFO L225 Difference]: With dead ends: 159 [2022-07-12 04:13:24,793 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 04:13:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:13:24,794 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:24,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 584 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 04:13:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2022-07-12 04:13:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 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) [2022-07-12 04:13:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-12 04:13:24,805 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2022-07-12 04:13:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:24,806 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-12 04:13:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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) [2022-07-12 04:13:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-12 04:13:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:13:24,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:24,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:24,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:25,016 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,SelfDestructingSolverStorable16 [2022-07-12 04:13:25,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2022-07-12 04:13:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:25,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368415749] [2022-07-12 04:13:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 04:13:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368415749] [2022-07-12 04:13:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368415749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855139163] [2022-07-12 04:13:25,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:25,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:25,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:25,088 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) [2022-07-12 04:13:25,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:13:25,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:25,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:25,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:13:25,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855139163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:25,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:25,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-12 04:13:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690481822] [2022-07-12 04:13:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:13:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:13:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:13:25,272 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:25,371 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2022-07-12 04:13:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:13:25,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-12 04:13:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:25,373 INFO L225 Difference]: With dead ends: 107 [2022-07-12 04:13:25,373 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 04:13:25,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:13:25,376 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:25,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 254 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 04:13:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-07-12 04:13:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 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) [2022-07-12 04:13:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-12 04:13:25,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2022-07-12 04:13:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:25,394 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-12 04:13:25,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-12 04:13:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:13:25,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:25,395 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:25,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:25,619 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,SelfDestructingSolverStorable17 [2022-07-12 04:13:25,620 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2022-07-12 04:13:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182192771] [2022-07-12 04:13:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:25,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:25,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:25,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182192771] [2022-07-12 04:13:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182192771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:25,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725407097] [2022-07-12 04:13:25,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:25,698 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) [2022-07-12 04:13:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:13:25,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:13:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:13:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:25,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725407097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:25,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:25,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 04:13:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901336653] [2022-07-12 04:13:25,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:13:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:13:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:13:25,979 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:26,217 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2022-07-12 04:13:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:13:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 04:13:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:26,218 INFO L225 Difference]: With dead ends: 131 [2022-07-12 04:13:26,219 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 04:13:26,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:13:26,219 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 170 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:26,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 305 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 04:13:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2022-07-12 04:13:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 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) [2022-07-12 04:13:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-07-12 04:13:26,237 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2022-07-12 04:13:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:26,237 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-07-12 04:13:26,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-07-12 04:13:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:13:26,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:26,238 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:26,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:26,454 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2022-07-12 04:13:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:26,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172725446] [2022-07-12 04:13:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:26,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172725446] [2022-07-12 04:13:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172725446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:26,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660951784] [2022-07-12 04:13:26,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:26,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:26,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:26,517 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) [2022-07-12 04:13:26,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:13:26,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:13:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:26,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:26,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660951784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:26,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:26,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 04:13:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751025958] [2022-07-12 04:13:26,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:13:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:13:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:13:26,789 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:26,990 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2022-07-12 04:13:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:13:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 04:13:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:26,992 INFO L225 Difference]: With dead ends: 121 [2022-07-12 04:13:26,992 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 04:13:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:13:26,994 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 216 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:26,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 488 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 04:13:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2022-07-12 04:13:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 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) [2022-07-12 04:13:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-07-12 04:13:27,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2022-07-12 04:13:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:27,025 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-07-12 04:13:27,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-07-12 04:13:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:13:27,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:27,026 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] [2022-07-12 04:13:27,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:27,235 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,SelfDestructingSolverStorable19 [2022-07-12 04:13:27,235 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2022-07-12 04:13:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252775589] [2022-07-12 04:13:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252775589] [2022-07-12 04:13:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252775589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085443124] [2022-07-12 04:13:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:27,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:27,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:27,266 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) [2022-07-12 04:13:27,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:13:27,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 04:13:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085443124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:27,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:27,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-12 04:13:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494426895] [2022-07-12 04:13:27,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:27,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:13:27,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:13:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:13:27,355 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-12 04:13:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:27,393 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-07-12 04:13:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:13:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 27 [2022-07-12 04:13:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:27,394 INFO L225 Difference]: With dead ends: 110 [2022-07-12 04:13:27,394 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 04:13:27,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:13:27,395 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:27,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 149 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 04:13:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-07-12 04:13:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 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) [2022-07-12 04:13:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-07-12 04:13:27,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2022-07-12 04:13:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:27,406 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-07-12 04:13:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-12 04:13:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-07-12 04:13:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:13:27,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:27,406 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] [2022-07-12 04:13:27,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:27,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:27,624 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2022-07-12 04:13:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:27,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482659052] [2022-07-12 04:13:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:27,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482659052] [2022-07-12 04:13:27,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482659052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:27,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381386249] [2022-07-12 04:13:27,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:27,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:27,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:27,656 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) [2022-07-12 04:13:27,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:13:27,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 04:13:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 04:13:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:27,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381386249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:27,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:27,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-12 04:13:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493620385] [2022-07-12 04:13:27,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:27,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:13:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:13:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:13:27,739 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-12 04:13:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:27,768 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-07-12 04:13:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:13:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 27 [2022-07-12 04:13:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:27,769 INFO L225 Difference]: With dead ends: 84 [2022-07-12 04:13:27,769 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 04:13:27,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:13:27,770 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:27,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 04:13:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-12 04:13:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 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) [2022-07-12 04:13:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-12 04:13:27,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2022-07-12 04:13:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:27,792 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-12 04:13:27,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-07-12 04:13:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-12 04:13:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 04:13:27,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:27,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:27,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:27,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:27,996 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2022-07-12 04:13:27,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365898965] [2022-07-12 04:13:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365898965] [2022-07-12 04:13:28,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365898965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565322037] [2022-07-12 04:13:28,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:28,172 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) [2022-07-12 04:13:28,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:13:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:13:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:28,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:28,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565322037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:28,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:28,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2022-07-12 04:13:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478327827] [2022-07-12 04:13:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:13:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:13:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:13:28,582 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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) [2022-07-12 04:13:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:29,114 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2022-07-12 04:13:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:13:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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 28 [2022-07-12 04:13:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:29,115 INFO L225 Difference]: With dead ends: 149 [2022-07-12 04:13:29,115 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 04:13:29,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 04:13:29,116 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 147 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:29,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 905 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 04:13:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2022-07-12 04:13:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 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) [2022-07-12 04:13:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-07-12 04:13:29,134 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2022-07-12 04:13:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:29,134 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-07-12 04:13:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 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) [2022-07-12 04:13:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-07-12 04:13:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 04:13:29,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:29,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:29,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:29,345 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,SelfDestructingSolverStorable22 [2022-07-12 04:13:29,346 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2022-07-12 04:13:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257506104] [2022-07-12 04:13:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257506104] [2022-07-12 04:13:29,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257506104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:29,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660651901] [2022-07-12 04:13:29,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:29,503 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) [2022-07-12 04:13:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:13:29,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 04:13:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:29,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:29,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660651901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:29,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:29,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-07-12 04:13:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281342539] [2022-07-12 04:13:29,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 04:13:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 04:13:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-07-12 04:13:29,865 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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) [2022-07-12 04:13:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:30,245 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-07-12 04:13:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 04:13:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 28 [2022-07-12 04:13:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:30,248 INFO L225 Difference]: With dead ends: 118 [2022-07-12 04:13:30,248 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 04:13:30,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:13:30,249 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:30,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 437 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 04:13:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-07-12 04:13:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 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) [2022-07-12 04:13:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-07-12 04:13:30,269 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2022-07-12 04:13:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:30,270 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-07-12 04:13:30,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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) [2022-07-12 04:13:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-07-12 04:13:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:13:30,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:30,270 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:30,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:30,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:30,476 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2022-07-12 04:13:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:30,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491549957] [2022-07-12 04:13:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491549957] [2022-07-12 04:13:30,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491549957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731410182] [2022-07-12 04:13:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:30,591 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) [2022-07-12 04:13:30,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:13:30,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:13:30,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:13:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:30,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:30,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731410182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:30,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:30,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-12 04:13:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769847334] [2022-07-12 04:13:30,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 04:13:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 04:13:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:13:30,930 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2022-07-12 04:13:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:31,448 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-07-12 04:13:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:13:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 29 [2022-07-12 04:13:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:31,451 INFO L225 Difference]: With dead ends: 155 [2022-07-12 04:13:31,452 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 04:13:31,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:13:31,453 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 375 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:31,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 462 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 04:13:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2022-07-12 04:13:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 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) [2022-07-12 04:13:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-07-12 04:13:31,488 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2022-07-12 04:13:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:31,488 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-07-12 04:13:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2022-07-12 04:13:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-07-12 04:13:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:13:31,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:31,489 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:31,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:31,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:31,703 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2022-07-12 04:13:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:31,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727382774] [2022-07-12 04:13:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727382774] [2022-07-12 04:13:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727382774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093195831] [2022-07-12 04:13:31,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:31,798 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) [2022-07-12 04:13:31,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:13:31,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:31,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:31,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:13:31,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:32,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093195831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:32,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:32,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-12 04:13:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279656965] [2022-07-12 04:13:32,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 04:13:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 04:13:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:13:32,133 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2022-07-12 04:13:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:32,537 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2022-07-12 04:13:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:13:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 29 [2022-07-12 04:13:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:32,539 INFO L225 Difference]: With dead ends: 144 [2022-07-12 04:13:32,539 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 04:13:32,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 04:13:32,540 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 319 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:32,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 880 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 04:13:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2022-07-12 04:13:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 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) [2022-07-12 04:13:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2022-07-12 04:13:32,567 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2022-07-12 04:13:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:32,567 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2022-07-12 04:13:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2022-07-12 04:13:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2022-07-12 04:13:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:13:32,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:32,568 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:32,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 04:13:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:32,783 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2022-07-12 04:13:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:32,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419324960] [2022-07-12 04:13:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419324960] [2022-07-12 04:13:32,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419324960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305477375] [2022-07-12 04:13:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:32,830 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) [2022-07-12 04:13:32,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:13:32,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:13:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:13:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:32,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:32,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305477375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:32,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:32,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-12 04:13:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535135945] [2022-07-12 04:13:32,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:13:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:32,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:13:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:13:32,936 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-07-12 04:13:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:33,014 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2022-07-12 04:13:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:13:33,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 29 [2022-07-12 04:13:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:33,019 INFO L225 Difference]: With dead ends: 139 [2022-07-12 04:13:33,019 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 04:13:33,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:13:33,019 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:33,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 127 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 04:13:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-07-12 04:13:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 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) [2022-07-12 04:13:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-07-12 04:13:33,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2022-07-12 04:13:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:33,040 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-07-12 04:13:33,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-07-12 04:13:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-07-12 04:13:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 04:13:33,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:33,041 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:33,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:33,246 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,SelfDestructingSolverStorable26 [2022-07-12 04:13:33,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2022-07-12 04:13:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474432073] [2022-07-12 04:13:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:33,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474432073] [2022-07-12 04:13:33,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474432073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:33,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422628474] [2022-07-12 04:13:33,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:33,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:33,293 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) [2022-07-12 04:13:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:13:33,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 04:13:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:13:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:33,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:13:33,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422628474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:33,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:33,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-12 04:13:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272651633] [2022-07-12 04:13:33,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:13:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:13:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:13:33,391 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-07-12 04:13:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:33,489 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2022-07-12 04:13:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:13:33,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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 29 [2022-07-12 04:13:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:33,490 INFO L225 Difference]: With dead ends: 262 [2022-07-12 04:13:33,491 INFO L226 Difference]: Without dead ends: 202 [2022-07-12 04:13:33,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:13:33,491 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 106 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:33,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 232 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-12 04:13:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2022-07-12 04:13:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 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) [2022-07-12 04:13:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2022-07-12 04:13:33,535 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2022-07-12 04:13:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:33,535 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2022-07-12 04:13:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2022-07-12 04:13:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2022-07-12 04:13:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:13:33,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:33,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:33,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 04:13:33,751 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,SelfDestructingSolverStorable27 [2022-07-12 04:13:33,752 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2022-07-12 04:13:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:33,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968322931] [2022-07-12 04:13:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:33,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:33,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968322931] [2022-07-12 04:13:33,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968322931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:33,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652684520] [2022-07-12 04:13:33,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:33,960 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) [2022-07-12 04:13:33,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 04:13:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 04:13:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:34,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652684520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:34,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:34,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2022-07-12 04:13:34,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782614063] [2022-07-12 04:13:34,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:34,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 04:13:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 04:13:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2022-07-12 04:13:34,398 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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) [2022-07-12 04:13:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:34,999 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2022-07-12 04:13:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:13:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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 30 [2022-07-12 04:13:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:35,000 INFO L225 Difference]: With dead ends: 258 [2022-07-12 04:13:35,000 INFO L226 Difference]: Without dead ends: 249 [2022-07-12 04:13:35,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:13:35,001 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 169 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:35,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1305 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-12 04:13:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2022-07-12 04:13:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 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) [2022-07-12 04:13:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-07-12 04:13:35,028 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2022-07-12 04:13:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:35,028 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-07-12 04:13:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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) [2022-07-12 04:13:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-07-12 04:13:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:13:35,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:35,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:35,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:35,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 04:13:35,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2022-07-12 04:13:35,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:35,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536848238] [2022-07-12 04:13:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:13:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536848238] [2022-07-12 04:13:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536848238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473399331] [2022-07-12 04:13:35,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:35,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:35,298 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) [2022-07-12 04:13:35,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 04:13:35,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:13:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:13:35,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:13:35,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473399331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:35,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:35,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-07-12 04:13:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280451418] [2022-07-12 04:13:35,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:35,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:13:35,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:13:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:13:35,540 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2022-07-12 04:13:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:35,919 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-07-12 04:13:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:13:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 30 [2022-07-12 04:13:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:35,927 INFO L225 Difference]: With dead ends: 217 [2022-07-12 04:13:35,927 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 04:13:35,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-07-12 04:13:35,928 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:35,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 324 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 04:13:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2022-07-12 04:13:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 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) [2022-07-12 04:13:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-07-12 04:13:35,959 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2022-07-12 04:13:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:35,959 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-07-12 04:13:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2022-07-12 04:13:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-07-12 04:13:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:13:35,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:35,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:35,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:36,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:36,164 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2022-07-12 04:13:36,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:36,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788929383] [2022-07-12 04:13:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:36,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:36,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788929383] [2022-07-12 04:13:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788929383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772620011] [2022-07-12 04:13:36,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:36,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:36,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:36,376 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) [2022-07-12 04:13:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 04:13:36,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:13:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:13:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:36,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:36,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772620011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:36,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:36,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-07-12 04:13:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778896348] [2022-07-12 04:13:36,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:36,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:13:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:13:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:13:36,823 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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) [2022-07-12 04:13:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:37,349 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2022-07-12 04:13:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:13:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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 30 [2022-07-12 04:13:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:37,350 INFO L225 Difference]: With dead ends: 226 [2022-07-12 04:13:37,350 INFO L226 Difference]: Without dead ends: 204 [2022-07-12 04:13:37,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 04:13:37,351 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:37,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 743 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-12 04:13:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2022-07-12 04:13:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 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) [2022-07-12 04:13:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2022-07-12 04:13:37,386 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2022-07-12 04:13:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:37,386 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2022-07-12 04:13:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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) [2022-07-12 04:13:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2022-07-12 04:13:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:13:37,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:37,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:37,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:37,590 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2022-07-12 04:13:37,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533170733] [2022-07-12 04:13:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:13:37,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533170733] [2022-07-12 04:13:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533170733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504240807] [2022-07-12 04:13:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:37,681 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:37,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 04:13:37,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:37,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:13:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:13:37,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 04:13:37,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504240807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:37,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:37,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-07-12 04:13:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554365816] [2022-07-12 04:13:37,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:13:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:13:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:13:37,926 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:38,201 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-07-12 04:13:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:13:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 04:13:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:38,202 INFO L225 Difference]: With dead ends: 186 [2022-07-12 04:13:38,202 INFO L226 Difference]: Without dead ends: 167 [2022-07-12 04:13:38,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-07-12 04:13:38,203 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 239 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:38,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 580 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-12 04:13:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2022-07-12 04:13:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 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) [2022-07-12 04:13:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2022-07-12 04:13:38,244 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2022-07-12 04:13:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:38,244 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2022-07-12 04:13:38,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:13:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2022-07-12 04:13:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 04:13:38,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:38,245 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:38,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-12 04:13:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 04:13:38,446 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2022-07-12 04:13:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196044784] [2022-07-12 04:13:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:38,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:38,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196044784] [2022-07-12 04:13:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196044784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:38,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276061295] [2022-07-12 04:13:38,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:38,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:38,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:38,550 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:38,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 04:13:38,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:13:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:13:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:38,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:38,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276061295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:38,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:38,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-12 04:13:38,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765972021] [2022-07-12 04:13:38,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:38,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:13:38,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:13:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:13:38,962 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2022-07-12 04:13:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:39,782 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2022-07-12 04:13:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:13:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 04:13:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:39,784 INFO L225 Difference]: With dead ends: 263 [2022-07-12 04:13:39,784 INFO L226 Difference]: Without dead ends: 233 [2022-07-12 04:13:39,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:13:39,785 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 657 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:39,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 635 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-12 04:13:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2022-07-12 04:13:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 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) [2022-07-12 04:13:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-07-12 04:13:39,824 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2022-07-12 04:13:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:39,824 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-07-12 04:13:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2022-07-12 04:13:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-07-12 04:13:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 04:13:39,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:39,825 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:39,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 04:13:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 04:13:40,025 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2022-07-12 04:13:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:40,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933403702] [2022-07-12 04:13:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:40,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933403702] [2022-07-12 04:13:40,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933403702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205082399] [2022-07-12 04:13:40,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:40,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:40,133 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:40,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 04:13:40,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:13:40,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:13:40,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:40,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:40,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205082399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:40,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:40,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-12 04:13:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863961719] [2022-07-12 04:13:40,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:13:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:13:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:13:40,538 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2022-07-12 04:13:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:41,087 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2022-07-12 04:13:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:13:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 04:13:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:41,088 INFO L225 Difference]: With dead ends: 251 [2022-07-12 04:13:41,088 INFO L226 Difference]: Without dead ends: 236 [2022-07-12 04:13:41,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:13:41,089 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 483 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:41,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1242 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-12 04:13:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-07-12 04:13:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 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) [2022-07-12 04:13:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2022-07-12 04:13:41,145 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2022-07-12 04:13:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:41,145 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2022-07-12 04:13:41,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2022-07-12 04:13:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2022-07-12 04:13:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 04:13:41,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:41,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:41,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:41,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:41,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2022-07-12 04:13:41,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:41,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324705907] [2022-07-12 04:13:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324705907] [2022-07-12 04:13:41,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324705907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593709045] [2022-07-12 04:13:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:41,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:41,395 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:41,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 04:13:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:13:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:41,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:41,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593709045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:41,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-12 04:13:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953763077] [2022-07-12 04:13:41,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:13:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:13:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:13:41,493 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-07-12 04:13:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:41,582 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2022-07-12 04:13:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:13:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 04:13:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:41,583 INFO L225 Difference]: With dead ends: 227 [2022-07-12 04:13:41,583 INFO L226 Difference]: Without dead ends: 171 [2022-07-12 04:13:41,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:13:41,584 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:41,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 206 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-12 04:13:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-07-12 04:13:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 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) [2022-07-12 04:13:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2022-07-12 04:13:41,628 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2022-07-12 04:13:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:41,628 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2022-07-12 04:13:41,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-07-12 04:13:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2022-07-12 04:13:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 04:13:41,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:41,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:41,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:41,846 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2022-07-12 04:13:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:41,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579355903] [2022-07-12 04:13:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579355903] [2022-07-12 04:13:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579355903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492245878] [2022-07-12 04:13:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:41,903 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:41,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 04:13:41,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:41,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:13:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:42,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:42,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492245878] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:42,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:42,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-12 04:13:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297371236] [2022-07-12 04:13:42,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:13:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:13:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:13:42,038 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-07-12 04:13:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:42,143 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2022-07-12 04:13:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:13:42,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 04:13:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:42,144 INFO L225 Difference]: With dead ends: 178 [2022-07-12 04:13:42,144 INFO L226 Difference]: Without dead ends: 172 [2022-07-12 04:13:42,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:13:42,145 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:42,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 237 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-12 04:13:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2022-07-12 04:13:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 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) [2022-07-12 04:13:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-12 04:13:42,198 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2022-07-12 04:13:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:42,198 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-12 04:13:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2022-07-12 04:13:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-12 04:13:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:13:42,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:42,199 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:42,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-12 04:13:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:42,399 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2022-07-12 04:13:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189876353] [2022-07-12 04:13:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189876353] [2022-07-12 04:13:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189876353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495356326] [2022-07-12 04:13:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:42,624 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:42,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 04:13:42,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:13:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:13:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:42,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:43,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495356326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:43,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:43,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-07-12 04:13:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721271415] [2022-07-12 04:13:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:13:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:13:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:13:43,106 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 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) [2022-07-12 04:13:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:43,977 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2022-07-12 04:13:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:13:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 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 32 [2022-07-12 04:13:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:43,979 INFO L225 Difference]: With dead ends: 305 [2022-07-12 04:13:43,979 INFO L226 Difference]: Without dead ends: 296 [2022-07-12 04:13:43,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:13:43,980 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 196 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:43,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1856 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:13:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-12 04:13:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2022-07-12 04:13:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 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) [2022-07-12 04:13:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2022-07-12 04:13:44,024 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2022-07-12 04:13:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:44,024 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2022-07-12 04:13:44,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 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) [2022-07-12 04:13:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2022-07-12 04:13:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:13:44,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:44,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:44,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 04:13:44,233 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2022-07-12 04:13:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55063727] [2022-07-12 04:13:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:44,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55063727] [2022-07-12 04:13:44,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55063727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998160177] [2022-07-12 04:13:44,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:44,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:44,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:44,465 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:44,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 04:13:44,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:44,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 04:13:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:44,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998160177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:44,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:44,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2022-07-12 04:13:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962419154] [2022-07-12 04:13:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 04:13:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 04:13:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 04:13:44,945 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 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) [2022-07-12 04:13:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:45,622 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2022-07-12 04:13:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 04:13:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 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 32 [2022-07-12 04:13:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:45,623 INFO L225 Difference]: With dead ends: 223 [2022-07-12 04:13:45,624 INFO L226 Difference]: Without dead ends: 200 [2022-07-12 04:13:45,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:13:45,625 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 118 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:45,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1047 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:13:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-12 04:13:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2022-07-12 04:13:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 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) [2022-07-12 04:13:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-12 04:13:45,666 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2022-07-12 04:13:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:45,666 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-12 04:13:45,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 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) [2022-07-12 04:13:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-12 04:13:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:13:45,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:45,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:45,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 04:13:45,868 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2022-07-12 04:13:45,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:45,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269808959] [2022-07-12 04:13:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:46,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269808959] [2022-07-12 04:13:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269808959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218607709] [2022-07-12 04:13:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:46,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:46,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:46,039 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:46,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 04:13:46,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:13:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:13:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:46,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:46,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218607709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:46,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:46,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-07-12 04:13:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521464002] [2022-07-12 04:13:46,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 04:13:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 04:13:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-07-12 04:13:46,499 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 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) [2022-07-12 04:13:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:46,989 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-07-12 04:13:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 04:13:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 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 32 [2022-07-12 04:13:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:46,990 INFO L225 Difference]: With dead ends: 198 [2022-07-12 04:13:46,990 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 04:13:46,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:13:46,991 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:46,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 476 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 04:13:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2022-07-12 04:13:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 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) [2022-07-12 04:13:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2022-07-12 04:13:47,047 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2022-07-12 04:13:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:47,047 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2022-07-12 04:13:47,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 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) [2022-07-12 04:13:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2022-07-12 04:13:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:13:47,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:47,048 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:47,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 04:13:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 04:13:47,248 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2022-07-12 04:13:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:47,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142017073] [2022-07-12 04:13:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:47,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142017073] [2022-07-12 04:13:47,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142017073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:47,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700263259] [2022-07-12 04:13:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:47,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:47,395 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:47,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 04:13:47,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:13:47,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:13:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:47,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:47,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700263259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:47,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:47,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-07-12 04:13:47,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408120617] [2022-07-12 04:13:47,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:47,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:13:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:47,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:13:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:13:47,891 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2022-07-12 04:13:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:49,365 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2022-07-12 04:13:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 04:13:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 04:13:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:49,366 INFO L225 Difference]: With dead ends: 299 [2022-07-12 04:13:49,366 INFO L226 Difference]: Without dead ends: 267 [2022-07-12 04:13:49,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 04:13:49,368 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 786 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:49,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 865 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-12 04:13:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2022-07-12 04:13:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 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) [2022-07-12 04:13:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2022-07-12 04:13:49,440 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2022-07-12 04:13:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:49,441 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2022-07-12 04:13:49,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2022-07-12 04:13:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2022-07-12 04:13:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:13:49,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:49,441 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:49,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:49,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 04:13:49,653 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2022-07-12 04:13:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736374695] [2022-07-12 04:13:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:49,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736374695] [2022-07-12 04:13:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736374695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71623559] [2022-07-12 04:13:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:49,816 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:49,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 04:13:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:13:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:50,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:13:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71623559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:50,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-07-12 04:13:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231135227] [2022-07-12 04:13:50,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:13:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:13:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:13:50,371 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2022-07-12 04:13:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:51,214 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2022-07-12 04:13:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 04:13:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 04:13:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:51,215 INFO L225 Difference]: With dead ends: 286 [2022-07-12 04:13:51,215 INFO L226 Difference]: Without dead ends: 270 [2022-07-12 04:13:51,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:13:51,217 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 734 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:51,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1762 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:13:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-12 04:13:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2022-07-12 04:13:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 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) [2022-07-12 04:13:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2022-07-12 04:13:51,305 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2022-07-12 04:13:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:51,305 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2022-07-12 04:13:51,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2022-07-12 04:13:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2022-07-12 04:13:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:13:51,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:51,306 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:51,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 04:13:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:51,507 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2022-07-12 04:13:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:51,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27861420] [2022-07-12 04:13:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27861420] [2022-07-12 04:13:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27861420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810506224] [2022-07-12 04:13:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:51,551 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 04:13:51,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:51,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:13:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:51,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:51,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810506224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:51,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:51,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-12 04:13:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051679915] [2022-07-12 04:13:51,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 04:13:51,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 04:13:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:13:51,652 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-07-12 04:13:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:51,796 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2022-07-12 04:13:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:13:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 04:13:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:51,797 INFO L225 Difference]: With dead ends: 247 [2022-07-12 04:13:51,797 INFO L226 Difference]: Without dead ends: 233 [2022-07-12 04:13:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:13:51,797 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-12 04:13:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2022-07-12 04:13:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 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) [2022-07-12 04:13:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2022-07-12 04:13:51,865 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2022-07-12 04:13:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:51,865 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2022-07-12 04:13:51,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-07-12 04:13:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2022-07-12 04:13:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 04:13:51,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:51,866 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:51,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-12 04:13:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-12 04:13:52,083 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2022-07-12 04:13:52,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:52,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692102834] [2022-07-12 04:13:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:52,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692102834] [2022-07-12 04:13:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692102834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812685966] [2022-07-12 04:13:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:13:52,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:52,121 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:52,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 04:13:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:13:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:13:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:52,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 04:13:52,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812685966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:52,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:52,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-12 04:13:52,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160429769] [2022-07-12 04:13:52,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:52,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 04:13:52,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 04:13:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:13:52,226 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-07-12 04:13:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:52,460 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2022-07-12 04:13:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:13:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-12 04:13:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:52,462 INFO L225 Difference]: With dead ends: 443 [2022-07-12 04:13:52,462 INFO L226 Difference]: Without dead ends: 353 [2022-07-12 04:13:52,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:13:52,462 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 205 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:52,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 274 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:13:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-12 04:13:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-07-12 04:13:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 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) [2022-07-12 04:13:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-07-12 04:13:52,548 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2022-07-12 04:13:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:52,549 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-07-12 04:13:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-07-12 04:13:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-07-12 04:13:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:13:52,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:52,549 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:52,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-12 04:13:52,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:52,763 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2022-07-12 04:13:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654411562] [2022-07-12 04:13:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654411562] [2022-07-12 04:13:53,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654411562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021921194] [2022-07-12 04:13:53,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:13:53,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:53,044 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:53,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 04:13:53,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:13:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:13:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:53,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:13:53,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021921194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:53,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:53,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2022-07-12 04:13:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944694767] [2022-07-12 04:13:53,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 04:13:53,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 04:13:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 04:13:53,512 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2022-07-12 04:13:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:54,460 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2022-07-12 04:13:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 04:13:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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 34 [2022-07-12 04:13:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:54,461 INFO L225 Difference]: With dead ends: 464 [2022-07-12 04:13:54,461 INFO L226 Difference]: Without dead ends: 455 [2022-07-12 04:13:54,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:13:54,462 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 212 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:54,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2328 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:13:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-12 04:13:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2022-07-12 04:13:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 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) [2022-07-12 04:13:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2022-07-12 04:13:54,551 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2022-07-12 04:13:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:54,551 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2022-07-12 04:13:54,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2022-07-12 04:13:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2022-07-12 04:13:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:13:54,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:54,552 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:54,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-12 04:13:54,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:54,761 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2022-07-12 04:13:54,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:54,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915442290] [2022-07-12 04:13:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:54,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915442290] [2022-07-12 04:13:55,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915442290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511552695] [2022-07-12 04:13:55,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:13:55,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:55,001 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:55,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 04:13:55,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:13:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:13:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:13:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511552695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:55,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:55,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2022-07-12 04:13:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483431944] [2022-07-12 04:13:55,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 04:13:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 04:13:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:13:55,520 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 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) [2022-07-12 04:13:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:56,384 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2022-07-12 04:13:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 04:13:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 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 34 [2022-07-12 04:13:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:56,386 INFO L225 Difference]: With dead ends: 364 [2022-07-12 04:13:56,386 INFO L226 Difference]: Without dead ends: 340 [2022-07-12 04:13:56,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:13:56,387 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:56,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1406 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:13:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-12 04:13:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2022-07-12 04:13:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 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) [2022-07-12 04:13:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-07-12 04:13:56,498 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2022-07-12 04:13:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:56,498 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-07-12 04:13:56,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 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) [2022-07-12 04:13:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-07-12 04:13:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:13:56,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:56,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:56,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-12 04:13:56,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 04:13:56,713 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2022-07-12 04:13:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:56,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443056063] [2022-07-12 04:13:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:13:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443056063] [2022-07-12 04:13:56,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443056063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939692618] [2022-07-12 04:13:56,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:13:56,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:56,808 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:56,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 04:13:56,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 04:13:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:13:56,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 04:13:57,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 04:13:57,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939692618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:57,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:57,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-12 04:13:57,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146736030] [2022-07-12 04:13:57,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:57,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:13:57,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:13:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:13:57,119 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:13:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:57,821 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2022-07-12 04:13:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:13:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 34 [2022-07-12 04:13:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:57,822 INFO L225 Difference]: With dead ends: 359 [2022-07-12 04:13:57,822 INFO L226 Difference]: Without dead ends: 314 [2022-07-12 04:13:57,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 04:13:57,823 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:57,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 471 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:13:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-12 04:13:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2022-07-12 04:13:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 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) [2022-07-12 04:13:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2022-07-12 04:13:57,911 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2022-07-12 04:13:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:57,911 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2022-07-12 04:13:57,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:13:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2022-07-12 04:13:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:13:57,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:57,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:57,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 04:13:58,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 04:13:58,114 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2022-07-12 04:13:58,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:58,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340651988] [2022-07-12 04:13:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:58,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340651988] [2022-07-12 04:13:58,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340651988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:58,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109315676] [2022-07-12 04:13:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:13:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:58,322 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:58,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 04:13:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:58,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 04:13:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:13:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:58,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:13:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:13:58,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109315676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:13:58,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:13:58,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-07-12 04:13:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692764484] [2022-07-12 04:13:58,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:13:58,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:13:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:13:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:13:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:13:58,835 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2022-07-12 04:13:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:13:59,499 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2022-07-12 04:13:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:13:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 34 [2022-07-12 04:13:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:13:59,501 INFO L225 Difference]: With dead ends: 352 [2022-07-12 04:13:59,501 INFO L226 Difference]: Without dead ends: 327 [2022-07-12 04:13:59,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:13:59,501 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:13:59,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 874 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:13:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-12 04:13:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2022-07-12 04:13:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 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) [2022-07-12 04:13:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2022-07-12 04:13:59,625 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2022-07-12 04:13:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:13:59,625 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2022-07-12 04:13:59,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2022-07-12 04:13:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2022-07-12 04:13:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:13:59,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:13:59,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:13:59,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 04:13:59,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 04:13:59,851 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:13:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:13:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2022-07-12 04:13:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:13:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56555694] [2022-07-12 04:13:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:13:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:13:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:13:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:13:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:13:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56555694] [2022-07-12 04:13:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56555694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:13:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588299396] [2022-07-12 04:13:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:13:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:13:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:13:59,934 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:13:59,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 04:13:59,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:13:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:13:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:13:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 04:14:00,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 04:14:00,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588299396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:00,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:00,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-12 04:14:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861879141] [2022-07-12 04:14:00,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:14:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:14:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:14:00,273 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-07-12 04:14:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:00,746 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-07-12 04:14:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:14:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 34 [2022-07-12 04:14:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:00,747 INFO L225 Difference]: With dead ends: 318 [2022-07-12 04:14:00,747 INFO L226 Difference]: Without dead ends: 294 [2022-07-12 04:14:00,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:14:00,748 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 359 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:00,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 896 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:14:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-12 04:14:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2022-07-12 04:14:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 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) [2022-07-12 04:14:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2022-07-12 04:14:00,856 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2022-07-12 04:14:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:00,856 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2022-07-12 04:14:00,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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) [2022-07-12 04:14:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2022-07-12 04:14:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:14:00,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:00,857 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:00,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-12 04:14:01,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 04:14:01,067 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:01,067 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2022-07-12 04:14:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:01,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264548498] [2022-07-12 04:14:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:01,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264548498] [2022-07-12 04:14:01,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264548498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557860635] [2022-07-12 04:14:01,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:14:01,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:01,228 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:01,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 04:14:01,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:14:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:14:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:01,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:01,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557860635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:01,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:01,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-12 04:14:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905287409] [2022-07-12 04:14:01,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 04:14:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 04:14:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 04:14:01,885 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2022-07-12 04:14:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:03,840 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2022-07-12 04:14:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 04:14:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 04:14:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:03,841 INFO L225 Difference]: With dead ends: 470 [2022-07-12 04:14:03,841 INFO L226 Difference]: Without dead ends: 434 [2022-07-12 04:14:03,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 04:14:03,842 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1168 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:03,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1093 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:14:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-12 04:14:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2022-07-12 04:14:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 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) [2022-07-12 04:14:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2022-07-12 04:14:03,954 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2022-07-12 04:14:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:03,954 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2022-07-12 04:14:03,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2022-07-12 04:14:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2022-07-12 04:14:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:14:03,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:03,954 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:03,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-12 04:14:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:04,155 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2022-07-12 04:14:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951075517] [2022-07-12 04:14:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951075517] [2022-07-12 04:14:04,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951075517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740259243] [2022-07-12 04:14:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:14:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:04,311 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 04:14:04,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:14:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:14:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:04,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:04,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740259243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:04,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:04,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-12 04:14:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574195993] [2022-07-12 04:14:04,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:04,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 04:14:04,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 04:14:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 04:14:04,944 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2022-07-12 04:14:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:06,075 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2022-07-12 04:14:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:14:06,075 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 04:14:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:06,076 INFO L225 Difference]: With dead ends: 456 [2022-07-12 04:14:06,076 INFO L226 Difference]: Without dead ends: 438 [2022-07-12 04:14:06,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:14:06,077 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 981 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:06,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 2547 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:14:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-07-12 04:14:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2022-07-12 04:14:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 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) [2022-07-12 04:14:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2022-07-12 04:14:06,199 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2022-07-12 04:14:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:06,199 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2022-07-12 04:14:06,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2022-07-12 04:14:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2022-07-12 04:14:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:14:06,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:06,200 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:06,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:06,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 04:14:06,416 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2022-07-12 04:14:06,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:06,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003553107] [2022-07-12 04:14:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:06,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003553107] [2022-07-12 04:14:06,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003553107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660986312] [2022-07-12 04:14:06,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:14:06,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:06,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:06,467 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:06,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 04:14:06,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:14:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:14:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:06,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660986312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:06,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:06,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-12 04:14:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179328805] [2022-07-12 04:14:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:06,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:14:06,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:14:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:14:06,587 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-07-12 04:14:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:06,799 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2022-07-12 04:14:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 04:14:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 04:14:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:06,801 INFO L225 Difference]: With dead ends: 394 [2022-07-12 04:14:06,801 INFO L226 Difference]: Without dead ends: 314 [2022-07-12 04:14:06,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:14:06,802 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:06,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 236 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-12 04:14:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2022-07-12 04:14:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 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) [2022-07-12 04:14:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2022-07-12 04:14:06,917 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2022-07-12 04:14:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:06,917 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2022-07-12 04:14:06,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-07-12 04:14:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2022-07-12 04:14:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:14:06,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:06,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:06,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:07,120 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2022-07-12 04:14:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229162903] [2022-07-12 04:14:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229162903] [2022-07-12 04:14:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229162903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571799704] [2022-07-12 04:14:07,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:14:07,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:07,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:07,195 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:07,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 04:14:07,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 04:14:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:14:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:07,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:07,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571799704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:07,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:07,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-12 04:14:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854020724] [2022-07-12 04:14:07,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:14:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:14:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:14:07,331 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-07-12 04:14:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:07,558 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2022-07-12 04:14:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 04:14:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 04:14:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:07,559 INFO L225 Difference]: With dead ends: 321 [2022-07-12 04:14:07,559 INFO L226 Difference]: Without dead ends: 315 [2022-07-12 04:14:07,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:14:07,559 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-12 04:14:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2022-07-12 04:14:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 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) [2022-07-12 04:14:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-07-12 04:14:07,691 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2022-07-12 04:14:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:07,691 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-07-12 04:14:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-07-12 04:14:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-07-12 04:14:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 04:14:07,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:07,692 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:07,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-12 04:14:07,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-12 04:14:07,895 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2022-07-12 04:14:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212958727] [2022-07-12 04:14:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212958727] [2022-07-12 04:14:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212958727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031239226] [2022-07-12 04:14:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:14:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:08,176 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:08,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 04:14:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:14:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:08,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:08,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031239226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:08,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:08,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2022-07-12 04:14:08,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033009498] [2022-07-12 04:14:08,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 04:14:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 04:14:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:14:08,703 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 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) [2022-07-12 04:14:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:10,003 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2022-07-12 04:14:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 04:14:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 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 36 [2022-07-12 04:14:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:10,005 INFO L225 Difference]: With dead ends: 540 [2022-07-12 04:14:10,005 INFO L226 Difference]: Without dead ends: 531 [2022-07-12 04:14:10,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 04:14:10,006 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 238 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:10,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 3271 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-12 04:14:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2022-07-12 04:14:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 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) [2022-07-12 04:14:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2022-07-12 04:14:10,143 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2022-07-12 04:14:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:10,143 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2022-07-12 04:14:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 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) [2022-07-12 04:14:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2022-07-12 04:14:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 04:14:10,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:10,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:10,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-12 04:14:10,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:10,354 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2022-07-12 04:14:10,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:10,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498572789] [2022-07-12 04:14:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:10,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:10,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498572789] [2022-07-12 04:14:10,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498572789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589367792] [2022-07-12 04:14:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:14:10,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:10,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:10,643 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 04:14:10,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:14:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:14:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:11,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:11,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589367792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:11,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:11,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2022-07-12 04:14:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855848213] [2022-07-12 04:14:11,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:11,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 04:14:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 04:14:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 04:14:11,262 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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) [2022-07-12 04:14:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:12,360 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2022-07-12 04:14:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:14:12,365 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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 36 [2022-07-12 04:14:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:12,366 INFO L225 Difference]: With dead ends: 427 [2022-07-12 04:14:12,366 INFO L226 Difference]: Without dead ends: 402 [2022-07-12 04:14:12,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:14:12,366 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 161 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:12,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2077 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:14:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-12 04:14:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2022-07-12 04:14:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 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) [2022-07-12 04:14:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-07-12 04:14:12,480 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2022-07-12 04:14:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:12,480 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-07-12 04:14:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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) [2022-07-12 04:14:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-07-12 04:14:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 04:14:12,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:12,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:12,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:12,687 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2022-07-12 04:14:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252001973] [2022-07-12 04:14:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252001973] [2022-07-12 04:14:12,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252001973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364662072] [2022-07-12 04:14:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:14:12,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:12,960 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:12,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 04:14:13,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:14:13,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:14:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:13,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364662072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:13,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2022-07-12 04:14:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003515866] [2022-07-12 04:14:13,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:13,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 04:14:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 04:14:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 04:14:13,490 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 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) [2022-07-12 04:14:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:14,200 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2022-07-12 04:14:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:14:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 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 36 [2022-07-12 04:14:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:14,201 INFO L225 Difference]: With dead ends: 352 [2022-07-12 04:14:14,201 INFO L226 Difference]: Without dead ends: 326 [2022-07-12 04:14:14,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 04:14:14,201 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 114 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:14,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1289 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:14:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-12 04:14:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-12 04:14:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 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) [2022-07-12 04:14:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2022-07-12 04:14:14,309 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2022-07-12 04:14:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:14,309 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2022-07-12 04:14:14,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 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) [2022-07-12 04:14:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2022-07-12 04:14:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 04:14:14,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:14,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:14,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-12 04:14:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-12 04:14:14,510 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2022-07-12 04:14:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722226449] [2022-07-12 04:14:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:14,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722226449] [2022-07-12 04:14:14,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722226449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:14,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32491197] [2022-07-12 04:14:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:14:14,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:14,705 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 04:14:14,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:14:14,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 04:14:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:15,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32491197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:15,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:15,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-07-12 04:14:15,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551272437] [2022-07-12 04:14:15,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:14:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:14:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:14:15,209 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2022-07-12 04:14:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:15,787 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2022-07-12 04:14:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:14:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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 36 [2022-07-12 04:14:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:15,789 INFO L225 Difference]: With dead ends: 324 [2022-07-12 04:14:15,789 INFO L226 Difference]: Without dead ends: 318 [2022-07-12 04:14:15,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=2491, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 04:14:15,790 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 503 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:14:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-12 04:14:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2022-07-12 04:14:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 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) [2022-07-12 04:14:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2022-07-12 04:14:15,916 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2022-07-12 04:14:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:15,916 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2022-07-12 04:14:15,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2022-07-12 04:14:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2022-07-12 04:14:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:14:15,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:15,917 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:15,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:16,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-12 04:14:16,131 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2022-07-12 04:14:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:16,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454075772] [2022-07-12 04:14:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:16,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:16,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454075772] [2022-07-12 04:14:16,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454075772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:16,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153385139] [2022-07-12 04:14:16,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:14:16,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:16,303 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 04:14:16,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 04:14:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 04:14:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:17,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153385139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:17,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:17,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-07-12 04:14:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358941149] [2022-07-12 04:14:17,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:14:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:14:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 04:14:17,044 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:19,834 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-07-12 04:14:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 04:14:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-12 04:14:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:19,836 INFO L225 Difference]: With dead ends: 520 [2022-07-12 04:14:19,836 INFO L226 Difference]: Without dead ends: 482 [2022-07-12 04:14:19,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2022-07-12 04:14:19,836 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1710 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:19,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 1352 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:14:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-12 04:14:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2022-07-12 04:14:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 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) [2022-07-12 04:14:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2022-07-12 04:14:19,965 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2022-07-12 04:14:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:19,966 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2022-07-12 04:14:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2022-07-12 04:14:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:14:19,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:19,966 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:19,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-12 04:14:20,183 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2022-07-12 04:14:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166245843] [2022-07-12 04:14:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166245843] [2022-07-12 04:14:20,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166245843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952703265] [2022-07-12 04:14:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:14:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:20,356 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:20,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 04:14:20,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 04:14:20,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:20,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 04:14:20,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:20,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:21,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952703265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:21,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:21,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-07-12 04:14:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616341904] [2022-07-12 04:14:21,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:21,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:14:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:14:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 04:14:21,136 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:22,663 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2022-07-12 04:14:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 04:14:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-12 04:14:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:22,665 INFO L225 Difference]: With dead ends: 505 [2022-07-12 04:14:22,665 INFO L226 Difference]: Without dead ends: 486 [2022-07-12 04:14:22,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 04:14:22,666 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1268 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:22,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 3508 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-12 04:14:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2022-07-12 04:14:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 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) [2022-07-12 04:14:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2022-07-12 04:14:22,827 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2022-07-12 04:14:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:22,828 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2022-07-12 04:14:22,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2022-07-12 04:14:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:14:22,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:22,832 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:22,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:23,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-12 04:14:23,051 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:23,051 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2022-07-12 04:14:23,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:23,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605038979] [2022-07-12 04:14:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:23,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605038979] [2022-07-12 04:14:23,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605038979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976792289] [2022-07-12 04:14:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:14:23,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:23,106 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:23,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 04:14:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:23,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:14:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:23,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:23,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976792289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:23,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:23,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-12 04:14:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039898307] [2022-07-12 04:14:23,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:14:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:14:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:14:23,240 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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) [2022-07-12 04:14:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:23,633 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2022-07-12 04:14:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:14:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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 37 [2022-07-12 04:14:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:23,635 INFO L225 Difference]: With dead ends: 404 [2022-07-12 04:14:23,635 INFO L226 Difference]: Without dead ends: 389 [2022-07-12 04:14:23,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-07-12 04:14:23,635 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 112 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:23,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 316 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-12 04:14:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2022-07-12 04:14:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 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) [2022-07-12 04:14:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2022-07-12 04:14:23,784 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2022-07-12 04:14:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:23,784 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2022-07-12 04:14:23,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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) [2022-07-12 04:14:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2022-07-12 04:14:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:14:23,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:23,785 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:23,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-12 04:14:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 04:14:23,985 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2022-07-12 04:14:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:23,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710936140] [2022-07-12 04:14:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710936140] [2022-07-12 04:14:24,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710936140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:24,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563135426] [2022-07-12 04:14:24,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:14:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:24,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:24,042 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:24,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-12 04:14:24,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:14:24,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:14:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:14:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563135426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:24,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:24,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-12 04:14:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054615297] [2022-07-12 04:14:24,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:14:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:14:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:14:24,174 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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) [2022-07-12 04:14:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:24,589 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2022-07-12 04:14:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:14:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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 37 [2022-07-12 04:14:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:24,591 INFO L225 Difference]: With dead ends: 685 [2022-07-12 04:14:24,591 INFO L226 Difference]: Without dead ends: 561 [2022-07-12 04:14:24,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-07-12 04:14:24,592 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 295 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:24,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 397 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-12 04:14:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2022-07-12 04:14:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 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) [2022-07-12 04:14:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-07-12 04:14:24,770 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2022-07-12 04:14:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:24,770 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-07-12 04:14:24,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 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) [2022-07-12 04:14:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-07-12 04:14:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:24,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:24,771 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:24,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-12 04:14:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 04:14:24,987 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2022-07-12 04:14:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:24,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437833402] [2022-07-12 04:14:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:25,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437833402] [2022-07-12 04:14:25,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437833402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:25,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818423354] [2022-07-12 04:14:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:14:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:25,313 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:25,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-12 04:14:25,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:14:25,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 04:14:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:25,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:25,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818423354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:25,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:25,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2022-07-12 04:14:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511747623] [2022-07-12 04:14:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:25,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:14:25,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:14:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 04:14:25,939 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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) [2022-07-12 04:14:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:27,529 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2022-07-12 04:14:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 04:14:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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 38 [2022-07-12 04:14:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:27,531 INFO L225 Difference]: With dead ends: 761 [2022-07-12 04:14:27,531 INFO L226 Difference]: Without dead ends: 752 [2022-07-12 04:14:27,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 04:14:27,532 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 257 mSDsluCounter, 3844 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 3978 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:27,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 3978 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-12 04:14:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2022-07-12 04:14:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 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) [2022-07-12 04:14:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2022-07-12 04:14:27,740 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2022-07-12 04:14:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2022-07-12 04:14:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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) [2022-07-12 04:14:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2022-07-12 04:14:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:27,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:27,741 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:27,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-12 04:14:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:27,941 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2022-07-12 04:14:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:27,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361440152] [2022-07-12 04:14:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:27,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:28,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361440152] [2022-07-12 04:14:28,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361440152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:28,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615341179] [2022-07-12 04:14:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:14:28,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:28,256 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-12 04:14:28,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:14:28,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:14:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:28,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:28,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615341179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:28,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:28,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2022-07-12 04:14:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964873501] [2022-07-12 04:14:28,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 04:14:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 04:14:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 04:14:28,883 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:30,211 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2022-07-12 04:14:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:14:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-12 04:14:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:30,213 INFO L225 Difference]: With dead ends: 623 [2022-07-12 04:14:30,213 INFO L226 Difference]: Without dead ends: 597 [2022-07-12 04:14:30,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 04:14:30,213 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 2828 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:30,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2930 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-12 04:14:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2022-07-12 04:14:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 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) [2022-07-12 04:14:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-07-12 04:14:30,385 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2022-07-12 04:14:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:30,385 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-07-12 04:14:30,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:14:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-07-12 04:14:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:30,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:30,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:30,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:30,587 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2022-07-12 04:14:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103032169] [2022-07-12 04:14:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:30,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:30,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103032169] [2022-07-12 04:14:30,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103032169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:30,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140567954] [2022-07-12 04:14:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:14:30,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:30,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:30,847 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:30,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-12 04:14:30,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:14:30,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:14:30,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:31,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:31,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140567954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:31,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:31,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-07-12 04:14:31,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48512626] [2022-07-12 04:14:31,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:31,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 04:14:31,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 04:14:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 04:14:31,437 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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) [2022-07-12 04:14:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:32,651 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2022-07-12 04:14:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:14:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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 38 [2022-07-12 04:14:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:32,653 INFO L225 Difference]: With dead ends: 530 [2022-07-12 04:14:32,653 INFO L226 Difference]: Without dead ends: 503 [2022-07-12 04:14:32,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 04:14:32,654 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 140 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:32,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1586 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:14:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-12 04:14:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2022-07-12 04:14:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 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) [2022-07-12 04:14:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2022-07-12 04:14:32,841 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2022-07-12 04:14:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:32,841 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2022-07-12 04:14:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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) [2022-07-12 04:14:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2022-07-12 04:14:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:32,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:32,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:32,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-12 04:14:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:33,058 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2022-07-12 04:14:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:33,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372408200] [2022-07-12 04:14:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 04:14:33,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:33,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372408200] [2022-07-12 04:14:33,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372408200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:33,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528091626] [2022-07-12 04:14:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:14:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:33,168 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:33,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-12 04:14:33,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:14:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:14:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 04:14:33,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 04:14:33,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528091626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:33,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:33,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-07-12 04:14:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584175624] [2022-07-12 04:14:33,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:14:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:14:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:14:33,555 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 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) [2022-07-12 04:14:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:34,695 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2022-07-12 04:14:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:14:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 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 38 [2022-07-12 04:14:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:34,696 INFO L225 Difference]: With dead ends: 556 [2022-07-12 04:14:34,697 INFO L226 Difference]: Without dead ends: 502 [2022-07-12 04:14:34,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=675, Invalid=2405, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:14:34,697 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 760 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:34,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 657 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:14:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-07-12 04:14:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2022-07-12 04:14:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 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) [2022-07-12 04:14:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2022-07-12 04:14:34,900 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2022-07-12 04:14:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:34,900 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2022-07-12 04:14:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 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) [2022-07-12 04:14:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2022-07-12 04:14:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:34,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:34,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:34,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-12 04:14:35,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:35,102 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2022-07-12 04:14:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:35,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629515345] [2022-07-12 04:14:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629515345] [2022-07-12 04:14:35,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629515345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805967461] [2022-07-12 04:14:35,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:14:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:35,329 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:35,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-12 04:14:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:14:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:35,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805967461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:35,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:35,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-12 04:14:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499557862] [2022-07-12 04:14:35,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 04:14:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 04:14:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 04:14:35,908 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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) [2022-07-12 04:14:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:36,772 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2022-07-12 04:14:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 04:14:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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 38 [2022-07-12 04:14:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:36,773 INFO L225 Difference]: With dead ends: 532 [2022-07-12 04:14:36,773 INFO L226 Difference]: Without dead ends: 504 [2022-07-12 04:14:36,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 04:14:36,774 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:36,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 909 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:14:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-12 04:14:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2022-07-12 04:14:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 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) [2022-07-12 04:14:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2022-07-12 04:14:36,980 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2022-07-12 04:14:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:36,981 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2022-07-12 04:14:36,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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) [2022-07-12 04:14:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2022-07-12 04:14:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:14:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:36,982 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:36,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-12 04:14:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-12 04:14:37,182 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2022-07-12 04:14:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:37,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109530094] [2022-07-12 04:14:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 04:14:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109530094] [2022-07-12 04:14:37,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109530094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888782883] [2022-07-12 04:14:37,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:14:37,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:37,298 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:37,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-12 04:14:37,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:14:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:14:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 04:14:37,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 04:14:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888782883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:37,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:37,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-07-12 04:14:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991705180] [2022-07-12 04:14:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:14:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:14:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:14:37,715 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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) [2022-07-12 04:14:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:38,492 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2022-07-12 04:14:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 04:14:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 38 [2022-07-12 04:14:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:38,494 INFO L225 Difference]: With dead ends: 505 [2022-07-12 04:14:38,494 INFO L226 Difference]: Without dead ends: 476 [2022-07-12 04:14:38,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 04:14:38,494 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 517 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:38,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1442 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:14:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-12 04:14:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2022-07-12 04:14:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 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) [2022-07-12 04:14:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2022-07-12 04:14:38,714 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2022-07-12 04:14:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:38,714 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2022-07-12 04:14:38,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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) [2022-07-12 04:14:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2022-07-12 04:14:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:14:38,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:38,715 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:38,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-12 04:14:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-12 04:14:38,915 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2022-07-12 04:14:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968402313] [2022-07-12 04:14:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968402313] [2022-07-12 04:14:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968402313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226618688] [2022-07-12 04:14:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:14:39,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:39,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:39,137 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:39,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-12 04:14:39,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 04:14:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 04:14:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:39,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:40,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226618688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:40,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:40,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-07-12 04:14:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815408004] [2022-07-12 04:14:40,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:40,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 04:14:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:40,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 04:14:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:14:40,081 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2022-07-12 04:14:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:43,922 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2022-07-12 04:14:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 04:14:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 39 [2022-07-12 04:14:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:43,925 INFO L225 Difference]: With dead ends: 768 [2022-07-12 04:14:43,925 INFO L226 Difference]: Without dead ends: 726 [2022-07-12 04:14:43,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2022-07-12 04:14:43,926 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2330 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:43,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2330 Valid, 1565 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:14:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-07-12 04:14:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2022-07-12 04:14:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 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) [2022-07-12 04:14:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2022-07-12 04:14:44,177 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2022-07-12 04:14:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:44,177 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2022-07-12 04:14:44,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2022-07-12 04:14:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2022-07-12 04:14:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:14:44,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:44,178 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:44,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-12 04:14:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:44,378 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2022-07-12 04:14:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:44,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078040046] [2022-07-12 04:14:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:44,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:44,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:44,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078040046] [2022-07-12 04:14:44,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078040046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:44,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523989707] [2022-07-12 04:14:44,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:14:44,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:44,600 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:44,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-12 04:14:44,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:14:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 04:14:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:45,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:14:45,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523989707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:45,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:45,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-07-12 04:14:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810520509] [2022-07-12 04:14:45,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:45,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 04:14:45,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 04:14:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:14:45,500 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2022-07-12 04:14:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:47,455 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2022-07-12 04:14:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 04:14:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 39 [2022-07-12 04:14:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:47,457 INFO L225 Difference]: With dead ends: 752 [2022-07-12 04:14:47,457 INFO L226 Difference]: Without dead ends: 731 [2022-07-12 04:14:47,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=477, Invalid=4779, Unknown=0, NotChecked=0, Total=5256 [2022-07-12 04:14:47,457 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1489 mSDsluCounter, 3832 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 3980 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:47,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 3980 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-07-12 04:14:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2022-07-12 04:14:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 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) [2022-07-12 04:14:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2022-07-12 04:14:47,719 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2022-07-12 04:14:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:47,719 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2022-07-12 04:14:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2022-07-12 04:14:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2022-07-12 04:14:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:14:47,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:47,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:47,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-12 04:14:47,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:47,928 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2022-07-12 04:14:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:47,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712873827] [2022-07-12 04:14:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:47,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712873827] [2022-07-12 04:14:47,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712873827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603260848] [2022-07-12 04:14:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:14:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:47,994 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:47,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-12 04:14:48,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:14:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:14:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:48,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603260848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:48,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:48,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-12 04:14:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572351607] [2022-07-12 04:14:48,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:48,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:14:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:14:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:14:48,125 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-12 04:14:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:48,548 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2022-07-12 04:14:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:14:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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 39 [2022-07-12 04:14:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:48,550 INFO L225 Difference]: With dead ends: 622 [2022-07-12 04:14:48,550 INFO L226 Difference]: Without dead ends: 514 [2022-07-12 04:14:48,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:14:48,550 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 159 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:48,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 312 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-12 04:14:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2022-07-12 04:14:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 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) [2022-07-12 04:14:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2022-07-12 04:14:48,813 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2022-07-12 04:14:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:48,813 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2022-07-12 04:14:48,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-12 04:14:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2022-07-12 04:14:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:14:48,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:48,814 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:48,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:49,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-12 04:14:49,029 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:49,030 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2022-07-12 04:14:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:49,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683051209] [2022-07-12 04:14:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:49,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:49,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683051209] [2022-07-12 04:14:49,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683051209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:49,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947495877] [2022-07-12 04:14:49,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:14:49,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:49,089 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:49,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-12 04:14:49,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:14:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:49,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:14:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:49,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:14:49,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947495877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:49,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:49,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-12 04:14:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645579718] [2022-07-12 04:14:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:49,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:14:49,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:14:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:14:49,214 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-12 04:14:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:49,655 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2022-07-12 04:14:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:14:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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 39 [2022-07-12 04:14:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:49,657 INFO L225 Difference]: With dead ends: 521 [2022-07-12 04:14:49,657 INFO L226 Difference]: Without dead ends: 515 [2022-07-12 04:14:49,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:14:49,657 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:49,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 270 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:14:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-12 04:14:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2022-07-12 04:14:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 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) [2022-07-12 04:14:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-07-12 04:14:49,934 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2022-07-12 04:14:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:49,934 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-07-12 04:14:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-12 04:14:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-07-12 04:14:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:14:49,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:49,934 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:49,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-12 04:14:50,135 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2022-07-12 04:14:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265720912] [2022-07-12 04:14:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:50,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:50,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265720912] [2022-07-12 04:14:50,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265720912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:50,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885883208] [2022-07-12 04:14:50,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:14:50,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:50,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:50,526 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:50,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-12 04:14:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 04:14:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:50,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:14:51,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885883208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:51,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:51,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2022-07-12 04:14:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955576254] [2022-07-12 04:14:51,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 04:14:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 04:14:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:14:51,181 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 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) [2022-07-12 04:14:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:53,175 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2022-07-12 04:14:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 04:14:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 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 40 [2022-07-12 04:14:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:53,177 INFO L225 Difference]: With dead ends: 872 [2022-07-12 04:14:53,177 INFO L226 Difference]: Without dead ends: 863 [2022-07-12 04:14:53,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2022-07-12 04:14:53,177 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 283 mSDsluCounter, 4927 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 5078 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:53,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 5078 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:14:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-07-12 04:14:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2022-07-12 04:14:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 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) [2022-07-12 04:14:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2022-07-12 04:14:53,430 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2022-07-12 04:14:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:53,430 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2022-07-12 04:14:53,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 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) [2022-07-12 04:14:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2022-07-12 04:14:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:14:53,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:53,431 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:53,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-12 04:14:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:53,636 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2022-07-12 04:14:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645681665] [2022-07-12 04:14:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:54,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645681665] [2022-07-12 04:14:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645681665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112534604] [2022-07-12 04:14:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:14:54,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:54,002 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:54,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-12 04:14:54,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:14:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 04:14:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:54,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:14:54,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112534604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:54,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:54,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2022-07-12 04:14:54,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889736999] [2022-07-12 04:14:54,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:54,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 04:14:54,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 04:14:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:14:54,677 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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) [2022-07-12 04:14:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:56,351 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2022-07-12 04:14:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 04:14:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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 40 [2022-07-12 04:14:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:56,352 INFO L225 Difference]: With dead ends: 719 [2022-07-12 04:14:56,352 INFO L226 Difference]: Without dead ends: 692 [2022-07-12 04:14:56,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 04:14:56,353 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 203 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 3329 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:14:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-07-12 04:14:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2022-07-12 04:14:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 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) [2022-07-12 04:14:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-07-12 04:14:56,599 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2022-07-12 04:14:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:56,599 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-07-12 04:14:56,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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) [2022-07-12 04:14:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-07-12 04:14:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:14:56,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:56,600 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:56,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-12 04:14:56,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-07-12 04:14:56,801 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2022-07-12 04:14:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:56,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297988724] [2022-07-12 04:14:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:56,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297988724] [2022-07-12 04:14:57,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297988724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462698006] [2022-07-12 04:14:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:14:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:57,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:57,085 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:57,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-12 04:14:57,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:14:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:14:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:14:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:57,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:14:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:14:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462698006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:14:57,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:14:57,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2022-07-12 04:14:57,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994931104] [2022-07-12 04:14:57,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:14:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 04:14:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:14:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 04:14:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 04:14:57,722 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-07-12 04:14:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:14:59,140 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2022-07-12 04:14:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 04:14:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 40 [2022-07-12 04:14:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:14:59,142 INFO L225 Difference]: With dead ends: 617 [2022-07-12 04:14:59,142 INFO L226 Difference]: Without dead ends: 589 [2022-07-12 04:14:59,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 04:14:59,143 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 153 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:14:59,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 2288 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:14:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-12 04:14:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2022-07-12 04:14:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 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) [2022-07-12 04:14:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2022-07-12 04:14:59,397 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2022-07-12 04:14:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:14:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2022-07-12 04:14:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-07-12 04:14:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2022-07-12 04:14:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:14:59,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:14:59,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:14:59,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-07-12 04:14:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:59,599 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:14:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:14:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2022-07-12 04:14:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:14:59,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431231806] [2022-07-12 04:14:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:14:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:14:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:14:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:14:59,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:14:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431231806] [2022-07-12 04:14:59,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431231806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:14:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732061339] [2022-07-12 04:14:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:14:59,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:14:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:14:59,861 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:14:59,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-12 04:14:59,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:14:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:14:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:14:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:15:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:15:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732061339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:00,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-12 04:15:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003053057] [2022-07-12 04:15:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 04:15:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 04:15:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:15:00,455 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 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) [2022-07-12 04:15:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:01,472 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2022-07-12 04:15:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 04:15:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 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 40 [2022-07-12 04:15:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:01,473 INFO L225 Difference]: With dead ends: 535 [2022-07-12 04:15:01,473 INFO L226 Difference]: Without dead ends: 506 [2022-07-12 04:15:01,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 04:15:01,474 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 113 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:01,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1402 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:15:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-12 04:15:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2022-07-12 04:15:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 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) [2022-07-12 04:15:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2022-07-12 04:15:01,707 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2022-07-12 04:15:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:01,707 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2022-07-12 04:15:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 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) [2022-07-12 04:15:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2022-07-12 04:15:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:15:01,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:01,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:01,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:01,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:01,927 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2022-07-12 04:15:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419019034] [2022-07-12 04:15:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:02,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419019034] [2022-07-12 04:15:02,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419019034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812417037] [2022-07-12 04:15:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:15:02,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:02,166 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:02,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-12 04:15:02,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:15:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:15:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:02,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:02,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812417037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:02,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:02,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2022-07-12 04:15:02,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818294110] [2022-07-12 04:15:02,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:02,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 04:15:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:02,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 04:15:02,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 04:15:02,799 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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) [2022-07-12 04:15:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:03,763 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2022-07-12 04:15:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 04:15:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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 40 [2022-07-12 04:15:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:03,765 INFO L225 Difference]: With dead ends: 504 [2022-07-12 04:15:03,765 INFO L226 Difference]: Without dead ends: 498 [2022-07-12 04:15:03,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:15:03,765 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:03,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 601 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:15:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-12 04:15:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2022-07-12 04:15:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 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) [2022-07-12 04:15:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2022-07-12 04:15:04,024 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2022-07-12 04:15:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:04,024 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2022-07-12 04:15:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 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) [2022-07-12 04:15:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2022-07-12 04:15:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:15:04,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:04,025 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:04,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:04,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-12 04:15:04,226 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:04,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2022-07-12 04:15:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227279155] [2022-07-12 04:15:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227279155] [2022-07-12 04:15:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227279155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891662076] [2022-07-12 04:15:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:15:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:04,465 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-12 04:15:04,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 04:15:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:15:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:05,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:05,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891662076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:05,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:05,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-07-12 04:15:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445485411] [2022-07-12 04:15:05,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:05,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:15:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:15:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:15:05,526 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2022-07-12 04:15:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:10,337 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2022-07-12 04:15:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-12 04:15:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 41 [2022-07-12 04:15:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:10,339 INFO L225 Difference]: With dead ends: 834 [2022-07-12 04:15:10,339 INFO L226 Difference]: Without dead ends: 790 [2022-07-12 04:15:10,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3271 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3617, Invalid=14205, Unknown=0, NotChecked=0, Total=17822 [2022-07-12 04:15:10,340 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2756 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2756 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:10,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2756 Valid, 1928 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:15:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-07-12 04:15:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2022-07-12 04:15:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 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) [2022-07-12 04:15:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2022-07-12 04:15:10,649 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2022-07-12 04:15:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2022-07-12 04:15:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2022-07-12 04:15:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2022-07-12 04:15:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:15:10,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:10,650 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:10,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-07-12 04:15:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:10,851 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2022-07-12 04:15:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062124624] [2022-07-12 04:15:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:11,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:11,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062124624] [2022-07-12 04:15:11,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062124624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:11,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001028075] [2022-07-12 04:15:11,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:15:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:11,109 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:11,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-12 04:15:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:15:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:11,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:12,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001028075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:12,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:12,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-07-12 04:15:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120225481] [2022-07-12 04:15:12,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:15:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:15:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:15:12,176 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2022-07-12 04:15:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:14,682 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2022-07-12 04:15:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:15:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 41 [2022-07-12 04:15:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:14,684 INFO L225 Difference]: With dead ends: 817 [2022-07-12 04:15:14,685 INFO L226 Difference]: Without dead ends: 795 [2022-07-12 04:15:14,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=561, Invalid=5919, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 04:15:14,685 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1960 mSDsluCounter, 5111 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 5275 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:14,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1960 Valid, 5275 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:15:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-07-12 04:15:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2022-07-12 04:15:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 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) [2022-07-12 04:15:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2022-07-12 04:15:14,977 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2022-07-12 04:15:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:14,977 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2022-07-12 04:15:14,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2022-07-12 04:15:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2022-07-12 04:15:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:15:14,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:14,978 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:14,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:15,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:15,179 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2022-07-12 04:15:15,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:15,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787710102] [2022-07-12 04:15:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:15,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787710102] [2022-07-12 04:15:15,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787710102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916834784] [2022-07-12 04:15:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:15:15,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:15,246 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:15,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-12 04:15:15,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:15:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:15:15,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:15,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:15,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916834784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:15,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:15,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-12 04:15:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513711418] [2022-07-12 04:15:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 04:15:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 04:15:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:15:15,402 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:16,066 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2022-07-12 04:15:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:15:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-12 04:15:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:16,067 INFO L225 Difference]: With dead ends: 618 [2022-07-12 04:15:16,067 INFO L226 Difference]: Without dead ends: 602 [2022-07-12 04:15:16,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:15:16,068 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 190 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:16,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 309 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:15:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-12 04:15:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2022-07-12 04:15:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 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) [2022-07-12 04:15:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2022-07-12 04:15:16,383 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2022-07-12 04:15:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:16,383 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2022-07-12 04:15:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2022-07-12 04:15:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:15:16,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:16,384 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:16,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-12 04:15:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:16,584 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2022-07-12 04:15:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029186862] [2022-07-12 04:15:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:16,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029186862] [2022-07-12 04:15:16,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029186862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:16,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136109868] [2022-07-12 04:15:16,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:15:16,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:16,647 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:16,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-12 04:15:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:15:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:15:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:16,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:15:16,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136109868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:16,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:16,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-12 04:15:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968192186] [2022-07-12 04:15:16,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 04:15:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 04:15:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:15:16,816 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:17,652 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2022-07-12 04:15:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:15:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-12 04:15:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:17,654 INFO L225 Difference]: With dead ends: 996 [2022-07-12 04:15:17,654 INFO L226 Difference]: Without dead ends: 834 [2022-07-12 04:15:17,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:15:17,655 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 321 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:17,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 465 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:15:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-07-12 04:15:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2022-07-12 04:15:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 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) [2022-07-12 04:15:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2022-07-12 04:15:18,016 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2022-07-12 04:15:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:18,016 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2022-07-12 04:15:18,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2022-07-12 04:15:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:18,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:18,017 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:18,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-07-12 04:15:18,218 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2022-07-12 04:15:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:18,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125441850] [2022-07-12 04:15:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:15:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125441850] [2022-07-12 04:15:18,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125441850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483354927] [2022-07-12 04:15:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:15:18,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:18,640 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:18,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-12 04:15:18,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:15:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 04:15:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:15:19,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:15:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483354927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:19,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:19,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2022-07-12 04:15:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550234306] [2022-07-12 04:15:19,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 04:15:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 04:15:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:15:19,335 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 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) [2022-07-12 04:15:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:21,998 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2022-07-12 04:15:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 04:15:21,999 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 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 42 [2022-07-12 04:15:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:22,001 INFO L225 Difference]: With dead ends: 1165 [2022-07-12 04:15:22,001 INFO L226 Difference]: Without dead ends: 1156 [2022-07-12 04:15:22,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=359, Invalid=6121, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 04:15:22,002 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 301 mSDsluCounter, 5128 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 5296 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:22,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 5296 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:15:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-07-12 04:15:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2022-07-12 04:15:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 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) [2022-07-12 04:15:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2022-07-12 04:15:22,371 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2022-07-12 04:15:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:22,371 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2022-07-12 04:15:22,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 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) [2022-07-12 04:15:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2022-07-12 04:15:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:22,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:22,372 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:22,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:22,589 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2022-07-12 04:15:22,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:22,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748893832] [2022-07-12 04:15:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:22,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:15:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748893832] [2022-07-12 04:15:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748893832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187246082] [2022-07-12 04:15:22,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:15:22,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:22,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:22,965 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:22,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-12 04:15:23,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 04:15:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 04:15:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:15:23,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:15:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187246082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:23,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:23,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2022-07-12 04:15:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243422078] [2022-07-12 04:15:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 04:15:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 04:15:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 04:15:23,671 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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) [2022-07-12 04:15:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:26,145 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2022-07-12 04:15:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 04:15:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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 42 [2022-07-12 04:15:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:26,147 INFO L225 Difference]: With dead ends: 983 [2022-07-12 04:15:26,147 INFO L226 Difference]: Without dead ends: 955 [2022-07-12 04:15:26,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=5369, Unknown=0, NotChecked=0, Total=5700 [2022-07-12 04:15:26,148 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 4540 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:26,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 4676 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 04:15:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-12 04:15:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2022-07-12 04:15:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 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) [2022-07-12 04:15:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2022-07-12 04:15:26,506 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2022-07-12 04:15:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:26,506 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2022-07-12 04:15:26,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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) [2022-07-12 04:15:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2022-07-12 04:15:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:26,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:26,507 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:26,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-07-12 04:15:26,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:26,709 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2022-07-12 04:15:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:26,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759565985] [2022-07-12 04:15:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:26,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:15:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759565985] [2022-07-12 04:15:27,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759565985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702352998] [2022-07-12 04:15:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:15:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:27,037 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:27,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-12 04:15:27,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:15:27,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 04:15:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:15:27,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:15:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702352998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:27,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:27,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2022-07-12 04:15:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183793032] [2022-07-12 04:15:27,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:27,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 04:15:27,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 04:15:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 04:15:27,783 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2022-07-12 04:15:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:29,499 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2022-07-12 04:15:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 04:15:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 42 [2022-07-12 04:15:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:29,501 INFO L225 Difference]: With dead ends: 853 [2022-07-12 04:15:29,501 INFO L226 Difference]: Without dead ends: 824 [2022-07-12 04:15:29,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=4787, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 04:15:29,501 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 179 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:29,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2710 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:15:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-07-12 04:15:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2022-07-12 04:15:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 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) [2022-07-12 04:15:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2022-07-12 04:15:29,877 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2022-07-12 04:15:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:29,877 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2022-07-12 04:15:29,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2022-07-12 04:15:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2022-07-12 04:15:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:29,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:29,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:29,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-12 04:15:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-07-12 04:15:30,078 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2022-07-12 04:15:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461271981] [2022-07-12 04:15:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:15:30,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:30,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461271981] [2022-07-12 04:15:30,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461271981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444762826] [2022-07-12 04:15:30,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:15:30,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:30,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:30,366 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:30,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-12 04:15:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:30,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:15:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:15:30,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:15:31,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444762826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:31,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:31,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2022-07-12 04:15:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170453436] [2022-07-12 04:15:31,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:31,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:15:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:15:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 04:15:31,052 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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) [2022-07-12 04:15:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:32,506 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2022-07-12 04:15:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:15:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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 42 [2022-07-12 04:15:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:32,508 INFO L225 Difference]: With dead ends: 754 [2022-07-12 04:15:32,508 INFO L226 Difference]: Without dead ends: 724 [2022-07-12 04:15:32,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 04:15:32,508 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:32,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1674 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:15:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-12 04:15:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2022-07-12 04:15:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 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) [2022-07-12 04:15:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2022-07-12 04:15:32,852 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2022-07-12 04:15:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2022-07-12 04:15:32,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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) [2022-07-12 04:15:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2022-07-12 04:15:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:32,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:32,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-12 04:15:33,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:33,053 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2022-07-12 04:15:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103966926] [2022-07-12 04:15:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 04:15:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103966926] [2022-07-12 04:15:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103966926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354856225] [2022-07-12 04:15:33,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:15:33,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:33,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:33,174 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:33,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-12 04:15:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:15:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:15:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:15:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:15:33,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354856225] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:33,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:33,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-07-12 04:15:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802445868] [2022-07-12 04:15:33,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:15:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:15:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:15:33,676 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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) [2022-07-12 04:15:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:35,669 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2022-07-12 04:15:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 04:15:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 42 [2022-07-12 04:15:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:35,672 INFO L225 Difference]: With dead ends: 816 [2022-07-12 04:15:35,672 INFO L226 Difference]: Without dead ends: 753 [2022-07-12 04:15:35,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1040, Invalid=3790, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 04:15:35,673 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1115 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:35,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 852 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:15:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-07-12 04:15:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2022-07-12 04:15:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 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) [2022-07-12 04:15:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2022-07-12 04:15:36,121 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2022-07-12 04:15:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:36,121 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2022-07-12 04:15:36,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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) [2022-07-12 04:15:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2022-07-12 04:15:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:36,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:36,122 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:36,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-12 04:15:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:36,322 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2022-07-12 04:15:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213790909] [2022-07-12 04:15:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:36,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:36,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213790909] [2022-07-12 04:15:36,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213790909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:36,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700680847] [2022-07-12 04:15:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:15:36,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:36,580 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:36,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-12 04:15:36,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:15:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:15:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:15:37,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700680847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:37,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:37,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2022-07-12 04:15:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844559256] [2022-07-12 04:15:37,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:37,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 04:15:37,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 04:15:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 04:15:37,225 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:38,669 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2022-07-12 04:15:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 04:15:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-12 04:15:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:38,670 INFO L225 Difference]: With dead ends: 774 [2022-07-12 04:15:38,670 INFO L226 Difference]: Without dead ends: 743 [2022-07-12 04:15:38,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=3719, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 04:15:38,671 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:38,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1032 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:15:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-07-12 04:15:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2022-07-12 04:15:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 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) [2022-07-12 04:15:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2022-07-12 04:15:39,085 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2022-07-12 04:15:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:39,085 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2022-07-12 04:15:39,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2022-07-12 04:15:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 04:15:39,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:39,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:39,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-07-12 04:15:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:39,286 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2022-07-12 04:15:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:39,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260825718] [2022-07-12 04:15:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 04:15:39,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260825718] [2022-07-12 04:15:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260825718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60674605] [2022-07-12 04:15:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:15:39,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:39,410 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:39,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-12 04:15:39,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:15:39,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:15:39,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:15:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 04:15:39,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60674605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:39,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:39,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-07-12 04:15:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743429395] [2022-07-12 04:15:39,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:39,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:15:39,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:15:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:15:39,887 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 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) [2022-07-12 04:15:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:41,280 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2022-07-12 04:15:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 04:15:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 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 42 [2022-07-12 04:15:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:41,282 INFO L225 Difference]: With dead ends: 755 [2022-07-12 04:15:41,282 INFO L226 Difference]: Without dead ends: 721 [2022-07-12 04:15:41,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:15:41,283 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 774 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:41,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 2110 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:15:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-07-12 04:15:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2022-07-12 04:15:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 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) [2022-07-12 04:15:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-07-12 04:15:41,732 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2022-07-12 04:15:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:41,732 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-07-12 04:15:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 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) [2022-07-12 04:15:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-07-12 04:15:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:15:41,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:41,733 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:41,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-07-12 04:15:41,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-12 04:15:41,934 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2022-07-12 04:15:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889320148] [2022-07-12 04:15:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:42,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889320148] [2022-07-12 04:15:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889320148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226099084] [2022-07-12 04:15:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:15:42,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:42,191 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:42,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-12 04:15:42,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 04:15:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:42,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:15:42,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:42,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:43,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226099084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:43,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:43,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2022-07-12 04:15:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979452092] [2022-07-12 04:15:43,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 04:15:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 04:15:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:15:43,384 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2022-07-12 04:15:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:50,213 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2022-07-12 04:15:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-12 04:15:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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 43 [2022-07-12 04:15:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:50,215 INFO L225 Difference]: With dead ends: 1173 [2022-07-12 04:15:50,215 INFO L226 Difference]: Without dead ends: 1125 [2022-07-12 04:15:50,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4689, Invalid=18567, Unknown=0, NotChecked=0, Total=23256 [2022-07-12 04:15:50,216 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2841 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2841 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:50,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2841 Valid, 2446 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:15:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-12 04:15:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2022-07-12 04:15:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 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) [2022-07-12 04:15:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2022-07-12 04:15:50,696 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2022-07-12 04:15:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:50,696 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2022-07-12 04:15:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2022-07-12 04:15:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2022-07-12 04:15:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:15:50,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:50,698 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:50,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-07-12 04:15:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-07-12 04:15:50,906 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2022-07-12 04:15:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779630508] [2022-07-12 04:15:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:51,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779630508] [2022-07-12 04:15:51,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779630508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118453604] [2022-07-12 04:15:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:15:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:51,237 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:51,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-12 04:15:51,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 04:15:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:15:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:52,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:15:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118453604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:52,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2022-07-12 04:15:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735368153] [2022-07-12 04:15:52,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 04:15:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 04:15:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3260, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:15:52,549 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2022-07-12 04:15:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:56,278 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2022-07-12 04:15:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 04:15:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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 43 [2022-07-12 04:15:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:56,281 INFO L225 Difference]: With dead ends: 1155 [2022-07-12 04:15:56,281 INFO L226 Difference]: Without dead ends: 1131 [2022-07-12 04:15:56,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=651, Invalid=7181, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 04:15:56,281 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2324 mSDsluCounter, 6232 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 6412 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:56,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 6412 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 04:15:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-07-12 04:15:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2022-07-12 04:15:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 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) [2022-07-12 04:15:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2022-07-12 04:15:56,834 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2022-07-12 04:15:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:56,834 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2022-07-12 04:15:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2022-07-12 04:15:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2022-07-12 04:15:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:15:56,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:56,838 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:56,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-07-12 04:15:57,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-12 04:15:57,039 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2022-07-12 04:15:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:57,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163498722] [2022-07-12 04:15:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163498722] [2022-07-12 04:15:57,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163498722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918543589] [2022-07-12 04:15:57,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:15:57,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:57,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:57,115 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:57,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-12 04:15:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:15:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:57,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:57,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918543589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:57,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:57,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-12 04:15:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659486655] [2022-07-12 04:15:57,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:57,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:15:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:15:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:15:57,295 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:15:58,134 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2022-07-12 04:15:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:15:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 04:15:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:15:58,136 INFO L225 Difference]: With dead ends: 919 [2022-07-12 04:15:58,136 INFO L226 Difference]: Without dead ends: 779 [2022-07-12 04:15:58,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 04:15:58,136 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:15:58,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 382 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:15:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-07-12 04:15:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2022-07-12 04:15:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 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) [2022-07-12 04:15:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2022-07-12 04:15:58,639 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2022-07-12 04:15:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:15:58,639 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2022-07-12 04:15:58,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:15:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2022-07-12 04:15:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 04:15:58,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:15:58,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:15:58,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-07-12 04:15:58,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-12 04:15:58,840 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:15:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:15:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2022-07-12 04:15:58,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:15:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587091305] [2022-07-12 04:15:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:15:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:15:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:15:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:15:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587091305] [2022-07-12 04:15:58,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587091305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:15:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843488163] [2022-07-12 04:15:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:15:58,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:15:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:15:58,919 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:15:58,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-12 04:15:58,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:15:58,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:15:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:15:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:15:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:15:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:15:59,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843488163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:15:59,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:15:59,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-12 04:15:59,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635126210] [2022-07-12 04:15:59,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:15:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:15:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:15:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:15:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:15:59,076 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:16:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:00,048 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2022-07-12 04:16:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:16:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 04:16:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:00,050 INFO L225 Difference]: With dead ends: 786 [2022-07-12 04:16:00,050 INFO L226 Difference]: Without dead ends: 780 [2022-07-12 04:16:00,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 04:16:00,050 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:00,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 386 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:16:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-12 04:16:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2022-07-12 04:16:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 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) [2022-07-12 04:16:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2022-07-12 04:16:00,577 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2022-07-12 04:16:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:00,577 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2022-07-12 04:16:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:16:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2022-07-12 04:16:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:00,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:00,578 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:00,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-07-12 04:16:00,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:00,781 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2022-07-12 04:16:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:00,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327840634] [2022-07-12 04:16:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:00,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:01,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327840634] [2022-07-12 04:16:01,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327840634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249930770] [2022-07-12 04:16:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:16:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:01,244 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:01,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-12 04:16:01,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 04:16:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 04:16:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:01,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249930770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:02,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:02,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 53 [2022-07-12 04:16:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619423244] [2022-07-12 04:16:02,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 04:16:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 04:16:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 04:16:02,047 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 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) [2022-07-12 04:16:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:05,267 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2022-07-12 04:16:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 04:16:05,267 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 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 44 [2022-07-12 04:16:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:05,269 INFO L225 Difference]: With dead ends: 1317 [2022-07-12 04:16:05,269 INFO L226 Difference]: Without dead ends: 1308 [2022-07-12 04:16:05,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 04:16:05,270 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 322 mSDsluCounter, 6069 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 6254 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:05,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 6254 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 04:16:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-07-12 04:16:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2022-07-12 04:16:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 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) [2022-07-12 04:16:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2022-07-12 04:16:05,763 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2022-07-12 04:16:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:05,763 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2022-07-12 04:16:05,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 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) [2022-07-12 04:16:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2022-07-12 04:16:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:05,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:05,764 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:05,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-12 04:16:05,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:05,980 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2022-07-12 04:16:05,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:05,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252813124] [2022-07-12 04:16:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252813124] [2022-07-12 04:16:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252813124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938216471] [2022-07-12 04:16:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:16:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:06,390 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-12 04:16:06,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:16:06,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 04:16:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:06,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:07,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938216471] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:07,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:07,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2022-07-12 04:16:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922526375] [2022-07-12 04:16:07,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:07,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 04:16:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 04:16:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2424, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:16:07,179 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 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) [2022-07-12 04:16:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:09,745 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2022-07-12 04:16:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 04:16:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 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 44 [2022-07-12 04:16:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:09,748 INFO L225 Difference]: With dead ends: 1118 [2022-07-12 04:16:09,748 INFO L226 Difference]: Without dead ends: 1089 [2022-07-12 04:16:09,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=349, Invalid=6131, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 04:16:09,749 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 240 mSDsluCounter, 5000 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 5157 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:09,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 5157 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:16:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-12 04:16:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2022-07-12 04:16:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 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) [2022-07-12 04:16:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2022-07-12 04:16:10,237 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2022-07-12 04:16:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:10,237 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2022-07-12 04:16:10,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 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) [2022-07-12 04:16:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2022-07-12 04:16:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:10,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:10,238 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:10,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-12 04:16:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:10,438 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2022-07-12 04:16:10,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:10,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099658557] [2022-07-12 04:16:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:16:10,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099658557] [2022-07-12 04:16:10,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099658557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451962294] [2022-07-12 04:16:10,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:16:10,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:10,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:10,830 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:10,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-12 04:16:10,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 04:16:10,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:10,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 04:16:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:16:11,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:16:11,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451962294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:11,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:11,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2022-07-12 04:16:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713400748] [2022-07-12 04:16:11,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:11,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 04:16:11,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 04:16:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:16:11,617 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2022-07-12 04:16:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:13,832 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2022-07-12 04:16:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 04:16:13,832 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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 44 [2022-07-12 04:16:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:13,834 INFO L225 Difference]: With dead ends: 977 [2022-07-12 04:16:13,834 INFO L226 Difference]: Without dead ends: 947 [2022-07-12 04:16:13,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=5509, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 04:16:13,835 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 198 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:13,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3723 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:16:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-07-12 04:16:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2022-07-12 04:16:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 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) [2022-07-12 04:16:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2022-07-12 04:16:14,326 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2022-07-12 04:16:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2022-07-12 04:16:14,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2022-07-12 04:16:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2022-07-12 04:16:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:14,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:14,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:14,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-07-12 04:16:14,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:14,528 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2022-07-12 04:16:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42310836] [2022-07-12 04:16:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:14,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:16:14,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42310836] [2022-07-12 04:16:14,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42310836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:14,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936011960] [2022-07-12 04:16:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:16:14,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:14,885 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:14,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-12 04:16:14,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:16:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 04:16:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:16:15,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:16:15,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936011960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:15,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:15,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-12 04:16:15,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021046447] [2022-07-12 04:16:15,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:15,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 04:16:15,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 04:16:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:16:15,652 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 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) [2022-07-12 04:16:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:17,502 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2022-07-12 04:16:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 04:16:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 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 44 [2022-07-12 04:16:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:17,503 INFO L225 Difference]: With dead ends: 869 [2022-07-12 04:16:17,503 INFO L226 Difference]: Without dead ends: 838 [2022-07-12 04:16:17,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=337, Invalid=4919, Unknown=0, NotChecked=0, Total=5256 [2022-07-12 04:16:17,504 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 154 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:17,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2332 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:16:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-12 04:16:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2022-07-12 04:16:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 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) [2022-07-12 04:16:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2022-07-12 04:16:17,967 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2022-07-12 04:16:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:17,967 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2022-07-12 04:16:17,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 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) [2022-07-12 04:16:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2022-07-12 04:16:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:17,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:17,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:17,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-07-12 04:16:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:18,169 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2022-07-12 04:16:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539222777] [2022-07-12 04:16:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:16:18,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539222777] [2022-07-12 04:16:18,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539222777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471818216] [2022-07-12 04:16:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:16:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:18,466 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:18,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-12 04:16:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:16:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:16:18,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:16:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471818216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:19,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:19,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-07-12 04:16:19,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448542188] [2022-07-12 04:16:19,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:19,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 04:16:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 04:16:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:16:19,197 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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) [2022-07-12 04:16:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:20,807 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2022-07-12 04:16:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:16:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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 44 [2022-07-12 04:16:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:20,808 INFO L225 Difference]: With dead ends: 780 [2022-07-12 04:16:20,808 INFO L226 Difference]: Without dead ends: 748 [2022-07-12 04:16:20,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 04:16:20,809 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 116 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:20,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1363 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:16:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-07-12 04:16:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2022-07-12 04:16:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 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) [2022-07-12 04:16:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2022-07-12 04:16:21,276 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2022-07-12 04:16:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:21,276 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2022-07-12 04:16:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 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) [2022-07-12 04:16:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2022-07-12 04:16:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 04:16:21,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:21,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:21,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-12 04:16:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-12 04:16:21,491 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2022-07-12 04:16:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:21,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868430527] [2022-07-12 04:16:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:16:21,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868430527] [2022-07-12 04:16:21,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868430527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86823646] [2022-07-12 04:16:21,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:16:21,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:21,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:21,776 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:21,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-12 04:16:21,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:16:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:16:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:16:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:16:22,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86823646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:22,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:22,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 43 [2022-07-12 04:16:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550830102] [2022-07-12 04:16:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 04:16:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 04:16:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 04:16:22,517 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-07-12 04:16:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:23,803 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2022-07-12 04:16:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:16:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 44 [2022-07-12 04:16:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:23,805 INFO L225 Difference]: With dead ends: 746 [2022-07-12 04:16:23,805 INFO L226 Difference]: Without dead ends: 740 [2022-07-12 04:16:23,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 04:16:23,805 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:23,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 597 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:16:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-07-12 04:16:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2022-07-12 04:16:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 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) [2022-07-12 04:16:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2022-07-12 04:16:24,302 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2022-07-12 04:16:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:24,302 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2022-07-12 04:16:24,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-07-12 04:16:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2022-07-12 04:16:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 04:16:24,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:24,303 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:24,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-12 04:16:24,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-07-12 04:16:24,504 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2022-07-12 04:16:24,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:24,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719014863] [2022-07-12 04:16:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:24,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719014863] [2022-07-12 04:16:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719014863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617461393] [2022-07-12 04:16:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:16:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:24,826 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:24,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-12 04:16:24,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 04:16:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:16:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:25,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:26,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617461393] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:26,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:26,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2022-07-12 04:16:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879676336] [2022-07-12 04:16:26,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 04:16:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 04:16:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3855, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 04:16:26,292 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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) [2022-07-12 04:16:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:34,801 INFO L93 Difference]: Finished difference Result 1257 states and 1344 transitions. [2022-07-12 04:16:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-12 04:16:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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 45 [2022-07-12 04:16:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:34,803 INFO L225 Difference]: With dead ends: 1257 [2022-07-12 04:16:34,803 INFO L226 Difference]: Without dead ends: 1207 [2022-07-12 04:16:34,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5917 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5965, Invalid=23791, Unknown=0, NotChecked=0, Total=29756 [2022-07-12 04:16:34,804 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3881 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3881 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:34,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3881 Valid, 2757 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:16:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-07-12 04:16:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 778. [2022-07-12 04:16:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0978120978120978) internal successors, (853), 777 states have internal predecessors, (853), 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) [2022-07-12 04:16:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 853 transitions. [2022-07-12 04:16:35,341 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 853 transitions. Word has length 45 [2022-07-12 04:16:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:35,341 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 853 transitions. [2022-07-12 04:16:35,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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) [2022-07-12 04:16:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 853 transitions. [2022-07-12 04:16:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 04:16:35,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:35,342 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:35,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-07-12 04:16:35,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:35,542 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550089, now seen corresponding path program 88 times [2022-07-12 04:16:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456691160] [2022-07-12 04:16:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:35,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456691160] [2022-07-12 04:16:35,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456691160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108417658] [2022-07-12 04:16:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:16:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:35,868 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-12 04:16:35,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:16:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:16:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:16:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108417658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:37,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:37,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2022-07-12 04:16:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193144082] [2022-07-12 04:16:37,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:37,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 04:16:37,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 04:16:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3856, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 04:16:37,391 INFO L87 Difference]: Start difference. First operand 778 states and 853 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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) [2022-07-12 04:16:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:41,707 INFO L93 Difference]: Finished difference Result 1238 states and 1319 transitions. [2022-07-12 04:16:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 04:16:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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 45 [2022-07-12 04:16:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:41,709 INFO L225 Difference]: With dead ends: 1238 [2022-07-12 04:16:41,709 INFO L226 Difference]: Without dead ends: 1213 [2022-07-12 04:16:41,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=747, Invalid=8565, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 04:16:41,710 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2728 mSDsluCounter, 7530 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2728 SdHoareTripleChecker+Valid, 7726 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:41,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2728 Valid, 7726 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 04:16:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-12 04:16:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 784. [2022-07-12 04:16:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.0970625798212006) internal successors, (859), 783 states have internal predecessors, (859), 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) [2022-07-12 04:16:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2022-07-12 04:16:42,265 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 45 [2022-07-12 04:16:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:42,265 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2022-07-12 04:16:42,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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) [2022-07-12 04:16:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2022-07-12 04:16:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 04:16:42,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:42,266 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:42,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-12 04:16:42,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:42,467 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash 579713141, now seen corresponding path program 89 times [2022-07-12 04:16:42,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:42,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911472595] [2022-07-12 04:16:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911472595] [2022-07-12 04:16:42,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911472595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374214562] [2022-07-12 04:16:42,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:16:42,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:42,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:42,553 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:42,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-12 04:16:42,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 04:16:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:16:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:42,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:42,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374214562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:42,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:42,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-12 04:16:42,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714069829] [2022-07-12 04:16:42,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:16:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:16:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:16:42,738 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:16:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:43,828 INFO L93 Difference]: Finished difference Result 897 states and 981 transitions. [2022-07-12 04:16:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 04:16:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 45 [2022-07-12 04:16:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:43,829 INFO L225 Difference]: With dead ends: 897 [2022-07-12 04:16:43,829 INFO L226 Difference]: Without dead ends: 880 [2022-07-12 04:16:43,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:16:43,830 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 223 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:43,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 366 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:16:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-12 04:16:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 824. [2022-07-12 04:16:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.1081409477521265) internal successors, (912), 823 states have internal predecessors, (912), 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) [2022-07-12 04:16:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 912 transitions. [2022-07-12 04:16:44,451 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 912 transitions. Word has length 45 [2022-07-12 04:16:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:44,451 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 912 transitions. [2022-07-12 04:16:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:16:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 912 transitions. [2022-07-12 04:16:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 04:16:44,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:44,452 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:44,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-07-12 04:16:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:44,659 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048364, now seen corresponding path program 90 times [2022-07-12 04:16:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449961330] [2022-07-12 04:16:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449961330] [2022-07-12 04:16:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449961330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806773874] [2022-07-12 04:16:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:16:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:44,741 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:44,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-12 04:16:44,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 04:16:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:16:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:44,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:16:44,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806773874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:44,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:44,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-12 04:16:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634974092] [2022-07-12 04:16:44,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:44,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 04:16:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 04:16:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-12 04:16:44,931 INFO L87 Difference]: Start difference. First operand 824 states and 912 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:16:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:46,415 INFO L93 Difference]: Finished difference Result 1384 states and 1555 transitions. [2022-07-12 04:16:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 04:16:46,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 45 [2022-07-12 04:16:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:46,416 INFO L225 Difference]: With dead ends: 1384 [2022-07-12 04:16:46,416 INFO L226 Difference]: Without dead ends: 1180 [2022-07-12 04:16:46,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:16:46,417 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 592 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:46,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 511 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:16:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-12 04:16:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 934. [2022-07-12 04:16:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 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) [2022-07-12 04:16:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-12 04:16:47,080 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 45 [2022-07-12 04:16:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-12 04:16:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2022-07-12 04:16:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-12 04:16:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:16:47,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:47,081 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:47,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-12 04:16:47,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:47,282 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2078840465, now seen corresponding path program 91 times [2022-07-12 04:16:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118320816] [2022-07-12 04:16:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:47,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118320816] [2022-07-12 04:16:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118320816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872139184] [2022-07-12 04:16:47,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:16:47,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:47,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:47,820 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:47,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-12 04:16:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 04:16:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:16:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872139184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:48,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:48,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 56 [2022-07-12 04:16:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412310690] [2022-07-12 04:16:48,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 04:16:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 04:16:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:16:48,728 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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) [2022-07-12 04:16:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:53,246 INFO L93 Difference]: Finished difference Result 1692 states and 1809 transitions. [2022-07-12 04:16:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-12 04:16:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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 46 [2022-07-12 04:16:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:53,249 INFO L225 Difference]: With dead ends: 1692 [2022-07-12 04:16:53,249 INFO L226 Difference]: Without dead ends: 1683 [2022-07-12 04:16:53,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=397, Invalid=7793, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 04:16:53,249 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 346 mSDsluCounter, 6873 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 7075 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:53,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 7075 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 04:16:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-07-12 04:16:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 943. [2022-07-12 04:16:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1093418259023355) internal successors, (1045), 942 states have internal predecessors, (1045), 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) [2022-07-12 04:16:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1045 transitions. [2022-07-12 04:16:53,966 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1045 transitions. Word has length 46 [2022-07-12 04:16:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:16:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1045 transitions. [2022-07-12 04:16:53,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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) [2022-07-12 04:16:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1045 transitions. [2022-07-12 04:16:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:16:53,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:16:53,967 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:16:53,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-12 04:16:54,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-12 04:16:54,168 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:16:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:16:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2111321103, now seen corresponding path program 92 times [2022-07-12 04:16:54,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:16:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771604052] [2022-07-12 04:16:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:16:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:16:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:16:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:16:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771604052] [2022-07-12 04:16:54,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771604052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:16:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384338387] [2022-07-12 04:16:54,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:16:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:16:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:16:54,666 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:16:54,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-12 04:16:54,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:16:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:16:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 04:16:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:16:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:16:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:16:55,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384338387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:16:55,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:16:55,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2022-07-12 04:16:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613883512] [2022-07-12 04:16:55,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:16:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:16:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:16:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:16:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:16:55,588 INFO L87 Difference]: Start difference. First operand 943 states and 1045 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:16:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:16:59,404 INFO L93 Difference]: Finished difference Result 1460 states and 1561 transitions. [2022-07-12 04:16:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 04:16:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 04:16:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:16:59,406 INFO L225 Difference]: With dead ends: 1460 [2022-07-12 04:16:59,406 INFO L226 Difference]: Without dead ends: 1430 [2022-07-12 04:16:59,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=367, Invalid=6943, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 04:16:59,407 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 263 mSDsluCounter, 5164 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 5334 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:16:59,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 5334 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 04:16:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-12 04:17:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 934. [2022-07-12 04:17:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 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) [2022-07-12 04:17:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-12 04:17:00,083 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 46 [2022-07-12 04:17:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:00,083 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-12 04:17:00,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:17:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-12 04:17:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:00,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:00,084 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:00,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-07-12 04:17:00,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-12 04:17:00,284 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1796342545, now seen corresponding path program 93 times [2022-07-12 04:17:00,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:00,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047227391] [2022-07-12 04:17:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:17:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047227391] [2022-07-12 04:17:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047227391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394398551] [2022-07-12 04:17:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:17:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:00,734 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:00,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-12 04:17:00,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:17:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 04:17:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:17:01,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:17:01,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394398551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:01,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:01,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2022-07-12 04:17:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190440872] [2022-07-12 04:17:01,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 04:17:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 04:17:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:17:01,553 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 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) [2022-07-12 04:17:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:04,633 INFO L93 Difference]: Finished difference Result 1285 states and 1385 transitions. [2022-07-12 04:17:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 04:17:04,633 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 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 46 [2022-07-12 04:17:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:04,635 INFO L225 Difference]: With dead ends: 1285 [2022-07-12 04:17:04,635 INFO L226 Difference]: Without dead ends: 1254 [2022-07-12 04:17:04,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=6281, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 04:17:04,636 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 226 mSDsluCounter, 4239 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 4375 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:04,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 4375 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:17:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-07-12 04:17:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 923. [2022-07-12 04:17:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.1095444685466378) internal successors, (1023), 922 states have internal predecessors, (1023), 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) [2022-07-12 04:17:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1023 transitions. [2022-07-12 04:17:05,302 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1023 transitions. Word has length 46 [2022-07-12 04:17:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:05,302 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1023 transitions. [2022-07-12 04:17:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 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) [2022-07-12 04:17:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1023 transitions. [2022-07-12 04:17:05,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:05,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:05,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:05,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-07-12 04:17:05,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-12 04:17:05,504 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -479321969, now seen corresponding path program 94 times [2022-07-12 04:17:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:05,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551965331] [2022-07-12 04:17:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:17:05,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:05,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551965331] [2022-07-12 04:17:05,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551965331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:05,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542867006] [2022-07-12 04:17:05,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:17:05,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:05,890 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:05,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-12 04:17:05,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:17:05,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:05,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 04:17:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:17:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 04:17:06,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542867006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:06,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:06,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2022-07-12 04:17:06,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493696523] [2022-07-12 04:17:06,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:06,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 04:17:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 04:17:06,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:17:06,718 INFO L87 Difference]: Start difference. First operand 923 states and 1023 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 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) [2022-07-12 04:17:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:09,292 INFO L93 Difference]: Finished difference Result 1149 states and 1248 transitions. [2022-07-12 04:17:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 04:17:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 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 46 [2022-07-12 04:17:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:09,294 INFO L225 Difference]: With dead ends: 1149 [2022-07-12 04:17:09,294 INFO L226 Difference]: Without dead ends: 1117 [2022-07-12 04:17:09,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=5651, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 04:17:09,294 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 180 mSDsluCounter, 2895 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:09,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2997 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:17:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-07-12 04:17:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 910. [2022-07-12 04:17:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.11001100110011) internal successors, (1009), 909 states have internal predecessors, (1009), 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) [2022-07-12 04:17:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1009 transitions. [2022-07-12 04:17:09,991 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1009 transitions. Word has length 46 [2022-07-12 04:17:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:09,991 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1009 transitions. [2022-07-12 04:17:09,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 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) [2022-07-12 04:17:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1009 transitions. [2022-07-12 04:17:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:09,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:09,992 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:10,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-12 04:17:10,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-12 04:17:10,193 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1560702865, now seen corresponding path program 95 times [2022-07-12 04:17:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251019135] [2022-07-12 04:17:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:17:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:10,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251019135] [2022-07-12 04:17:10,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251019135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:10,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895169290] [2022-07-12 04:17:10,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:17:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:10,526 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:10,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-12 04:17:10,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:17:10,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 04:17:10,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:17:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 04:17:11,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895169290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:11,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:11,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2022-07-12 04:17:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624371993] [2022-07-12 04:17:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 04:17:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 04:17:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 04:17:11,296 INFO L87 Difference]: Start difference. First operand 910 states and 1009 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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) [2022-07-12 04:17:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:13,461 INFO L93 Difference]: Finished difference Result 1044 states and 1142 transitions. [2022-07-12 04:17:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 04:17:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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 46 [2022-07-12 04:17:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:13,463 INFO L225 Difference]: With dead ends: 1044 [2022-07-12 04:17:13,463 INFO L226 Difference]: Without dead ends: 1011 [2022-07-12 04:17:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 04:17:13,463 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:13,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1834 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:17:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-12 04:17:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 895. [2022-07-12 04:17:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.110738255033557) internal successors, (993), 894 states have internal predecessors, (993), 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) [2022-07-12 04:17:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 993 transitions. [2022-07-12 04:17:14,129 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 993 transitions. Word has length 46 [2022-07-12 04:17:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:14,129 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 993 transitions. [2022-07-12 04:17:14,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 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) [2022-07-12 04:17:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 993 transitions. [2022-07-12 04:17:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:14,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:14,130 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:14,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-12 04:17:14,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-07-12 04:17:14,332 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1236184286, now seen corresponding path program 96 times [2022-07-12 04:17:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:14,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620912753] [2022-07-12 04:17:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:14,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-12 04:17:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:14,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620912753] [2022-07-12 04:17:14,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620912753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:14,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432621251] [2022-07-12 04:17:14,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:17:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:14,480 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:14,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-12 04:17:14,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 04:17:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:17:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 04:17:14,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 04:17:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432621251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:15,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:15,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-07-12 04:17:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5606341] [2022-07-12 04:17:15,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 04:17:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 04:17:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1444, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 04:17:15,086 INFO L87 Difference]: Start difference. First operand 895 states and 993 transitions. Second operand has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:17:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:18,052 INFO L93 Difference]: Finished difference Result 1147 states and 1264 transitions. [2022-07-12 04:17:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 04:17:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 04:17:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:18,054 INFO L225 Difference]: With dead ends: 1147 [2022-07-12 04:17:18,054 INFO L226 Difference]: Without dead ends: 1075 [2022-07-12 04:17:18,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1516, Invalid=5624, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 04:17:18,054 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1506 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1506 Valid, 1264 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:17:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-07-12 04:17:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 986. [2022-07-12 04:17:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.099492385786802) internal successors, (1083), 985 states have internal predecessors, (1083), 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) [2022-07-12 04:17:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1083 transitions. [2022-07-12 04:17:18,805 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1083 transitions. Word has length 46 [2022-07-12 04:17:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:18,805 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1083 transitions. [2022-07-12 04:17:18,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:17:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1083 transitions. [2022-07-12 04:17:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:18,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:18,806 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:18,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-07-12 04:17:19,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:19,006 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash 833817871, now seen corresponding path program 97 times [2022-07-12 04:17:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:19,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086936763] [2022-07-12 04:17:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:17:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086936763] [2022-07-12 04:17:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086936763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250606288] [2022-07-12 04:17:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:17:19,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:19,317 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:19,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-12 04:17:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:17:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:17:19,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:17:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250606288] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:20,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:20,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 46 [2022-07-12 04:17:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962977905] [2022-07-12 04:17:20,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:20,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 04:17:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 04:17:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 04:17:20,116 INFO L87 Difference]: Start difference. First operand 986 states and 1083 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2022-07-12 04:17:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:22,139 INFO L93 Difference]: Finished difference Result 1086 states and 1186 transitions. [2022-07-12 04:17:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 04:17:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 46 [2022-07-12 04:17:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:22,141 INFO L225 Difference]: With dead ends: 1086 [2022-07-12 04:17:22,141 INFO L226 Difference]: Without dead ends: 1052 [2022-07-12 04:17:22,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 04:17:22,142 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 114 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:22,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1020 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:17:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-07-12 04:17:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 981. [2022-07-12 04:17:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.1010204081632653) internal successors, (1079), 980 states have internal predecessors, (1079), 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) [2022-07-12 04:17:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1079 transitions. [2022-07-12 04:17:22,957 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1079 transitions. Word has length 46 [2022-07-12 04:17:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:22,957 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1079 transitions. [2022-07-12 04:17:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2022-07-12 04:17:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1079 transitions. [2022-07-12 04:17:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:17:22,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:22,958 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:22,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-07-12 04:17:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:23,170 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash -175659490, now seen corresponding path program 98 times [2022-07-12 04:17:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218569323] [2022-07-12 04:17:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-12 04:17:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218569323] [2022-07-12 04:17:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218569323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681897667] [2022-07-12 04:17:23,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:17:23,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:23,320 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:23,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-12 04:17:23,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:17:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:23,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:17:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 04:17:23,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 04:17:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681897667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:23,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:23,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-07-12 04:17:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314464163] [2022-07-12 04:17:23,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 04:17:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 04:17:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1444, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 04:17:23,928 INFO L87 Difference]: Start difference. First operand 981 states and 1079 transitions. Second operand has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 states have internal predecessors, (63), 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) [2022-07-12 04:17:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:17:26,037 INFO L93 Difference]: Finished difference Result 1076 states and 1168 transitions. [2022-07-12 04:17:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:17:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 states have internal predecessors, (63), 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 46 [2022-07-12 04:17:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:17:26,039 INFO L225 Difference]: With dead ends: 1076 [2022-07-12 04:17:26,039 INFO L226 Difference]: Without dead ends: 1037 [2022-07-12 04:17:26,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:17:26,040 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 1011 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 3006 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:17:26,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 3006 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:17:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-07-12 04:17:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 981. [2022-07-12 04:17:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.0887755102040817) internal successors, (1067), 980 states have internal predecessors, (1067), 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) [2022-07-12 04:17:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1067 transitions. [2022-07-12 04:17:26,838 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1067 transitions. Word has length 46 [2022-07-12 04:17:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:17:26,838 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1067 transitions. [2022-07-12 04:17:26,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 40 states have internal predecessors, (63), 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) [2022-07-12 04:17:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1067 transitions. [2022-07-12 04:17:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 04:17:26,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:17:26,839 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:17:26,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-07-12 04:17:27,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-07-12 04:17:27,051 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:17:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:17:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash 643092471, now seen corresponding path program 99 times [2022-07-12 04:17:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:17:27,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377940980] [2022-07-12 04:17:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:17:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:17:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:17:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:17:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:17:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377940980] [2022-07-12 04:17:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377940980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:17:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707745466] [2022-07-12 04:17:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:17:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:17:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:17:27,387 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:17:27,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-12 04:17:27,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 04:17:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:17:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 04:17:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:17:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:17:28,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:17:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:17:28,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707745466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:17:28,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:17:28,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2022-07-12 04:17:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435727933] [2022-07-12 04:17:28,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:17:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-12 04:17:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:17:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-12 04:17:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4501, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 04:17:28,993 INFO L87 Difference]: Start difference. First operand 981 states and 1067 transitions. Second operand has 69 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 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)