./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/up.i --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/loop-invgen/up.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 03:57:55,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 03:57:55,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 03:57:55,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 03:57:55,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 03:57:55,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 03:57:55,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 03:57:55,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 03:57:55,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 03:57:55,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 03:57:55,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 03:57:55,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 03:57:55,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 03:57:55,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 03:57:55,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 03:57:55,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 03:57:55,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 03:57:55,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 03:57:55,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 03:57:55,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 03:57:55,736 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 03:57:55,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 03:57:55,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 03:57:55,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 03:57:55,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 03:57:55,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 03:57:55,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 03:57:55,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 03:57:55,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 03:57:55,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 03:57:55,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 03:57:55,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 03:57:55,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 03:57:55,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 03:57:55,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 03:57:55,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 03:57:55,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 03:57:55,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 03:57:55,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 03:57:55,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 03:57:55,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 03:57:55,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 03:57:55,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 03:57:55,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 03:57:55,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 03:57:55,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 03:57:55,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 03:57:55,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 03:57:55,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 03:57:55,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 03:57:55,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 03:57:55,797 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 03:57:55,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 03:57:55,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 03:57:55,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 03:57:55,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 03:57:55,799 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 03:57:55,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 03:57:55,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 03:57:55,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 03:57:55,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 03:57:55,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:55,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 03:57:55,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 03:57:55,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 03:57:55,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 03:57:55,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 03:57:55,801 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 03:57:55,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 03:57:55,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 03:57:55,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f [2022-07-12 03:57:55,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 03:57:56,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 03:57:56,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 03:57:56,004 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 03:57:56,004 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 03:57:56,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/up.i [2022-07-12 03:57:56,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c026dd51a/5c22fa298ae84b6ea7252c1b04fc6a04/FLAG47519566b [2022-07-12 03:57:56,459 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 03:57:56,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/up.i [2022-07-12 03:57:56,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c026dd51a/5c22fa298ae84b6ea7252c1b04fc6a04/FLAG47519566b [2022-07-12 03:57:56,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c026dd51a/5c22fa298ae84b6ea7252c1b04fc6a04 [2022-07-12 03:57:56,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 03:57:56,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 03:57:56,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:56,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 03:57:56,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 03:57:56,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c3fc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56, skipping insertion in model container [2022-07-12 03:57:56,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 03:57:56,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 03:57:56,575 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/loop-invgen/up.i[893,906] [2022-07-12 03:57:56,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:56,589 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 03:57:56,597 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/loop-invgen/up.i[893,906] [2022-07-12 03:57:56,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:56,611 INFO L208 MainTranslator]: Completed translation [2022-07-12 03:57:56,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56 WrapperNode [2022-07-12 03:57:56,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:56,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:56,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 03:57:56,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 03:57:56,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,635 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-07-12 03:57:56,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:56,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 03:57:56,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 03:57:56,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 03:57:56,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 03:57:56,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 03:57:56,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 03:57:56,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 03:57:56,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (1/1) ... [2022-07-12 03:57:56,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:56,675 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 03:57:56,676 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 03:57:56,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 03:57:56,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 03:57:56,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 03:57:56,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 03:57:56,735 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 03:57:56,736 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 03:57:56,801 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 03:57:56,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 03:57:56,805 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 03:57:56,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:56 BoogieIcfgContainer [2022-07-12 03:57:56,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 03:57:56,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 03:57:56,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 03:57:56,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 03:57:56,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 03:57:56" (1/3) ... [2022-07-12 03:57:56,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dfc75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:56, skipping insertion in model container [2022-07-12 03:57:56,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:56" (2/3) ... [2022-07-12 03:57:56,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dfc75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:56, skipping insertion in model container [2022-07-12 03:57:56,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:56" (3/3) ... [2022-07-12 03:57:56,824 INFO L111 eAbstractionObserver]: Analyzing ICFG up.i [2022-07-12 03:57:56,832 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 03:57:56,833 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 03:57:56,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 03:57:56,875 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@4d580399, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52b6bf0f [2022-07-12 03:57:56,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 03:57:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 03:57:56,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:56,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:56,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2022-07-12 03:57:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:56,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658211188] [2022-07-12 03:57:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,106 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 03:57:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:57,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658211188] [2022-07-12 03:57:57,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658211188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:57,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:57,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014051593] [2022-07-12 03:57:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:57,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:57,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:57,163 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:57,228 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-07-12 03:57:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 03:57:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-07-12 03:57:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:57,236 INFO L225 Difference]: With dead ends: 27 [2022-07-12 03:57:57,236 INFO L226 Difference]: Without dead ends: 10 [2022-07-12 03:57:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:57,241 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:57,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-12 03:57:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-12 03:57:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-12 03:57:57,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-07-12 03:57:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:57,272 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-12 03:57:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-12 03:57:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 03:57:57,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:57,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 03:57:57,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2022-07-12 03:57:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:57,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955282395] [2022-07-12 03:57:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:57,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955282395] [2022-07-12 03:57:57,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955282395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:57,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46187805] [2022-07-12 03:57:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:57,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:57,319 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 03:57:57,320 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 03:57:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 03:57:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:57,398 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 03:57:57,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 03:57:57,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46187805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:57,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 03:57:57,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-12 03:57:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741767273] [2022-07-12 03:57:57,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:57,402 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:57,435 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-07-12 03:57:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:57:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-07-12 03:57:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:57,436 INFO L225 Difference]: With dead ends: 20 [2022-07-12 03:57:57,436 INFO L226 Difference]: Without dead ends: 18 [2022-07-12 03:57:57,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 03:57:57,438 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:57,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-12 03:57:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-07-12 03:57:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-12 03:57:57,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-07-12 03:57:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:57,448 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-12 03:57:57,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-12 03:57:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 03:57:57,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:57,450 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:57,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:57,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2022-07-12 03:57:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790881667] [2022-07-12 03:57:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790881667] [2022-07-12 03:57:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790881667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059705915] [2022-07-12 03:57:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:57,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:57,738 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 03:57:57,739 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 03:57:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 03:57:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:57,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059705915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:57,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:57,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-12 03:57:57,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63926661] [2022-07-12 03:57:57,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 03:57:57,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 03:57:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-12 03:57:57,871 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 03:57:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:57,914 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-07-12 03:57:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 03:57:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11 [2022-07-12 03:57:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:57,916 INFO L225 Difference]: With dead ends: 23 [2022-07-12 03:57:57,916 INFO L226 Difference]: Without dead ends: 13 [2022-07-12 03:57:57,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:57:57,917 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:57,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-07-12 03:57:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-07-12 03:57:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-07-12 03:57:57,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-07-12 03:57:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:57,919 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-07-12 03:57:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 03:57:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-07-12 03:57:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 03:57:57,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:57,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:57,945 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 03:57:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 03:57:58,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2022-07-12 03:57:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:58,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441080717] [2022-07-12 03:57:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441080717] [2022-07-12 03:57:58,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441080717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:58,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465806010] [2022-07-12 03:57:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:57:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:58,183 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 03:57:58,185 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 03:57:58,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:57:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:58,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 03:57:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465806010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:58,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:58,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-07-12 03:57:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464943592] [2022-07-12 03:57:58,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 03:57:58,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 03:57:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 03:57:58,291 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:58,354 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-07-12 03:57:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 03:57:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2022-07-12 03:57:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:58,355 INFO L225 Difference]: With dead ends: 24 [2022-07-12 03:57:58,355 INFO L226 Difference]: Without dead ends: 22 [2022-07-12 03:57:58,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:57:58,356 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:58,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-12 03:57:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2022-07-12 03:57:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-12 03:57:58,359 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2022-07-12 03:57:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:58,360 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-12 03:57:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:57:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-12 03:57:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 03:57:58,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:58,360 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:58,389 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 03:57:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:58,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2022-07-12 03:57:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550067276] [2022-07-12 03:57:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:58,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550067276] [2022-07-12 03:57:58,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550067276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677310787] [2022-07-12 03:57:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:57:58,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:58,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:58,656 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 03:57:58,657 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 03:57:58,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 03:57:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 03:57:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:58,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677310787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:58,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:58,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-12 03:57:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517848313] [2022-07-12 03:57:58,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:58,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 03:57:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 03:57:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:57:58,827 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 03:57:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:58,890 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-12 03:57:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 03:57:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) Word has length 15 [2022-07-12 03:57:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:58,891 INFO L225 Difference]: With dead ends: 30 [2022-07-12 03:57:58,891 INFO L226 Difference]: Without dead ends: 17 [2022-07-12 03:57:58,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-12 03:57:58,895 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:58,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-12 03:57:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-12 03:57:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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 03:57:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-12 03:57:58,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-07-12 03:57:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:58,900 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-12 03:57:58,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 03:57:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-12 03:57:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:58,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:58,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:58,917 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 03:57:59,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:59,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2022-07-12 03:57:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532270560] [2022-07-12 03:57:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532270560] [2022-07-12 03:57:59,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532270560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916952096] [2022-07-12 03:57:59,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:57:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:59,171 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 03:57:59,173 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 03:57:59,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:57:59,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 03:57:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916952096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:59,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-12 03:57:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36431757] [2022-07-12 03:57:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 03:57:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 03:57:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 03:57:59,273 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 03:57:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:59,333 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-12 03:57:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 03:57:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 16 [2022-07-12 03:57:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:59,334 INFO L225 Difference]: With dead ends: 28 [2022-07-12 03:57:59,334 INFO L226 Difference]: Without dead ends: 26 [2022-07-12 03:57:59,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:57:59,335 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:59,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-12 03:57:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-07-12 03:57:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 03:57:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-12 03:57:59,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-07-12 03:57:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-12 03:57:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 03:57:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-12 03:57:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 03:57:59,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:59,338 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:59,356 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 03:57:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:59,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2022-07-12 03:57:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458399323] [2022-07-12 03:57:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:59,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458399323] [2022-07-12 03:57:59,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458399323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529760249] [2022-07-12 03:57:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:57:59,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:59,644 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 03:57:59,646 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 03:57:59,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 03:57:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:59,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 03:57:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529760249] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:59,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-12 03:57:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455912788] [2022-07-12 03:57:59,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 03:57:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 03:57:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-12 03:57:59,796 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 03:57:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:59,860 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-12 03:57:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 03:57:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 19 [2022-07-12 03:57:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:59,861 INFO L225 Difference]: With dead ends: 37 [2022-07-12 03:57:59,861 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 03:57:59,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-12 03:57:59,862 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:59,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 03:57:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-12 03:57:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 03:57:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-12 03:57:59,865 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2022-07-12 03:57:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:59,865 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-12 03:57:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 03:57:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-12 03:57:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 03:57:59,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:59,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:59,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 03:58:00,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2022-07-12 03:58:00,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:00,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357641908] [2022-07-12 03:58:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357641908] [2022-07-12 03:58:00,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357641908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462484073] [2022-07-12 03:58:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:00,138 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 03:58:00,139 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 03:58:00,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 03:58:00,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 03:58:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462484073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:00,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:00,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-07-12 03:58:00,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607083646] [2022-07-12 03:58:00,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:00,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 03:58:00,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 03:58:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 03:58:00,236 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 03:58:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:00,294 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-07-12 03:58:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 03:58:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 20 [2022-07-12 03:58:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:00,294 INFO L225 Difference]: With dead ends: 32 [2022-07-12 03:58:00,295 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 03:58:00,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-07-12 03:58:00,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:00,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 23 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 03:58:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-07-12 03:58:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-07-12 03:58:00,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-07-12 03:58:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:00,299 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-07-12 03:58:00,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 03:58:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-07-12 03:58:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:58:00,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:00,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:00,317 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 03:58:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2022-07-12 03:58:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907335768] [2022-07-12 03:58:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907335768] [2022-07-12 03:58:00,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907335768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967258012] [2022-07-12 03:58:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:00,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:00,603 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 03:58:00,610 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 03:58:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 03:58:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967258012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:00,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:00,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-12 03:58:00,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726255753] [2022-07-12 03:58:00,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:00,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 03:58:00,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 03:58:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:58:00,782 INFO L87 Difference]: Start difference. First operand 24 states and 25 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 03:58:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:00,863 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-07-12 03:58:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 03:58:00,863 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 23 [2022-07-12 03:58:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:00,865 INFO L225 Difference]: With dead ends: 44 [2022-07-12 03:58:00,865 INFO L226 Difference]: Without dead ends: 25 [2022-07-12 03:58:00,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:00,867 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:00,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-12 03:58:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-12 03:58:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-12 03:58:00,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-07-12 03:58:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:00,873 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-12 03:58:00,873 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 03:58:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-12 03:58:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 03:58:00,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:00,874 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:00,909 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 03:58:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 03:58:01,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2022-07-12 03:58:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524935008] [2022-07-12 03:58:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524935008] [2022-07-12 03:58:01,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524935008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:01,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461952513] [2022-07-12 03:58:01,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:01,144 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 03:58:01,145 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 03:58:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 03:58:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461952513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:01,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:01,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-12 03:58:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982171255] [2022-07-12 03:58:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 03:58:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 03:58:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-12 03:58:01,253 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 03:58:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:01,337 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-07-12 03:58:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 03:58:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 24 [2022-07-12 03:58:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:01,338 INFO L225 Difference]: With dead ends: 36 [2022-07-12 03:58:01,338 INFO L226 Difference]: Without dead ends: 34 [2022-07-12 03:58:01,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-07-12 03:58:01,339 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:01,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-12 03:58:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-07-12 03:58:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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 03:58:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-07-12 03:58:01,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-07-12 03:58:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:01,342 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-07-12 03:58:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 03:58:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-07-12 03:58:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 03:58:01,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:01,343 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:01,360 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 03:58:01,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 03:58:01,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2022-07-12 03:58:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:01,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601034776] [2022-07-12 03:58:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601034776] [2022-07-12 03:58:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601034776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309569510] [2022-07-12 03:58:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:01,661 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 03:58:01,662 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 03:58:01,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 03:58:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 03:58:01,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309569510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:01,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:01,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-12 03:58:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451030242] [2022-07-12 03:58:01,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:01,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 03:58:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:01,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 03:58:01,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:58:01,851 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 03:58:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:01,946 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-12 03:58:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 03:58:01,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 27 [2022-07-12 03:58:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:01,947 INFO L225 Difference]: With dead ends: 51 [2022-07-12 03:58:01,947 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 03:58:01,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:58:01,948 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 03:58:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-12 03:58:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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 03:58:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-12 03:58:01,951 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2022-07-12 03:58:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:01,951 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-12 03:58:01,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 03:58:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-12 03:58:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 03:58:01,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:01,951 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:01,970 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 03:58:02,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 03:58:02,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2022-07-12 03:58:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687818603] [2022-07-12 03:58:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:02,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687818603] [2022-07-12 03:58:02,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687818603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641215115] [2022-07-12 03:58:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:02,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:02,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:02,218 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 03:58:02,243 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 03:58:02,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 03:58:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641215115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:02,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:02,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 03:58:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784060940] [2022-07-12 03:58:02,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 03:58:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 03:58:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:58:02,327 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 03:58:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:02,404 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-12 03:58:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:58:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 28 [2022-07-12 03:58:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:02,405 INFO L225 Difference]: With dead ends: 40 [2022-07-12 03:58:02,405 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 03:58:02,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:58:02,406 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:02,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 03:58:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-07-12 03:58:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-12 03:58:02,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2022-07-12 03:58:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:02,410 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-12 03:58:02,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 03:58:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-12 03:58:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 03:58:02,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:02,410 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:02,435 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 03:58:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 03:58:02,616 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2022-07-12 03:58:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516876410] [2022-07-12 03:58:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516876410] [2022-07-12 03:58:02,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516876410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397892961] [2022-07-12 03:58:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:02,736 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 03:58:02,737 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 03:58:02,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 03:58:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 03:58:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:02,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397892961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:02,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:02,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-12 03:58:02,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13349526] [2022-07-12 03:58:02,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:02,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 03:58:02,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:02,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 03:58:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:02,971 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 03:58:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:03,080 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-12 03:58:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 03:58:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 31 [2022-07-12 03:58:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:03,080 INFO L225 Difference]: With dead ends: 58 [2022-07-12 03:58:03,080 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 03:58:03,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 03:58:03,082 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:03,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 74 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 03:58:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 03:58:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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 03:58:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-12 03:58:03,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2022-07-12 03:58:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:03,085 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-12 03:58:03,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 03:58:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-12 03:58:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 03:58:03,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:03,086 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:03,106 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 03:58:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 03:58:03,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2022-07-12 03:58:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:03,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967842955] [2022-07-12 03:58:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:03,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967842955] [2022-07-12 03:58:03,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967842955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:03,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024742121] [2022-07-12 03:58:03,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:03,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:03,373 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 03:58:03,374 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 03:58:03,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 03:58:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 03:58:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024742121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:03,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:03,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-07-12 03:58:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025623941] [2022-07-12 03:58:03,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 03:58:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 03:58:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-12 03:58:03,496 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 03:58:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:03,585 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-07-12 03:58:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 03:58:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 32 [2022-07-12 03:58:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:03,587 INFO L225 Difference]: With dead ends: 44 [2022-07-12 03:58:03,587 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 03:58:03,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-07-12 03:58:03,587 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:03,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 03:58:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-07-12 03:58:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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 03:58:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-12 03:58:03,593 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-07-12 03:58:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:03,593 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-12 03:58:03,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 03:58:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-12 03:58:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 03:58:03,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:03,594 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:03,622 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 03:58:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 03:58:03,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2022-07-12 03:58:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365834494] [2022-07-12 03:58:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365834494] [2022-07-12 03:58:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365834494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208143417] [2022-07-12 03:58:03,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:03,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:03,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:03,926 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 03:58:03,927 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 03:58:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 03:58:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208143417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:04,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:04,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-12 03:58:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770118018] [2022-07-12 03:58:04,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 03:58:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 03:58:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:58:04,225 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 03:58:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:04,346 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2022-07-12 03:58:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 03:58:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 35 [2022-07-12 03:58:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:04,346 INFO L225 Difference]: With dead ends: 65 [2022-07-12 03:58:04,347 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 03:58:04,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:58:04,348 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:04,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 03:58:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-12 03:58:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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 03:58:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-12 03:58:04,351 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-07-12 03:58:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:04,351 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-12 03:58:04,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 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 03:58:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-12 03:58:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 03:58:04,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:04,351 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:04,370 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 03:58:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2022-07-12 03:58:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:04,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971123081] [2022-07-12 03:58:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971123081] [2022-07-12 03:58:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971123081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859525479] [2022-07-12 03:58:04,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:04,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:04,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:04,640 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 03:58:04,641 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 03:58:04,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 03:58:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859525479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:04,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:04,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-07-12 03:58:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123860245] [2022-07-12 03:58:04,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 03:58:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 03:58:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-12 03:58:04,758 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:04,859 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-07-12 03:58:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 03:58:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:04,860 INFO L225 Difference]: With dead ends: 48 [2022-07-12 03:58:04,860 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 03:58:04,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-07-12 03:58:04,860 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:04,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 03:58:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-07-12 03:58:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 03:58:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-12 03:58:04,864 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-07-12 03:58:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:04,864 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-12 03:58:04,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-12 03:58:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 03:58:04,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:04,865 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:04,893 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 03:58:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 03:58:05,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2022-07-12 03:58:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648253746] [2022-07-12 03:58:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648253746] [2022-07-12 03:58:05,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648253746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857233783] [2022-07-12 03:58:05,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:05,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:05,246 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 03:58:05,287 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 03:58:05,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-12 03:58:05,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 03:58:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857233783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:05,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:05,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-12 03:58:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248858509] [2022-07-12 03:58:05,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 03:58:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 03:58:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-07-12 03:58:05,572 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 03:58:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:05,713 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-07-12 03:58:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 03:58:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 39 [2022-07-12 03:58:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:05,714 INFO L225 Difference]: With dead ends: 72 [2022-07-12 03:58:05,714 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 03:58:05,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 03:58:05,715 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:05,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 03:58:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-12 03:58:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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 03:58:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-12 03:58:05,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2022-07-12 03:58:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:05,718 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-12 03:58:05,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 03:58:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-12 03:58:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 03:58:05,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:05,718 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:05,737 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 03:58:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 03:58:05,919 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2022-07-12 03:58:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:05,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872637897] [2022-07-12 03:58:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872637897] [2022-07-12 03:58:06,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872637897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452396879] [2022-07-12 03:58:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:06,012 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 03:58:06,013 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 03:58:06,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:06,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:06,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 03:58:06,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452396879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:06,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:06,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-07-12 03:58:06,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261445706] [2022-07-12 03:58:06,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 03:58:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 03:58:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-12 03:58:06,148 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 03:58:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:06,246 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-07-12 03:58:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 03:58:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 40 [2022-07-12 03:58:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:06,247 INFO L225 Difference]: With dead ends: 52 [2022-07-12 03:58:06,247 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 03:58:06,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:06,248 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:06,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:58:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 03:58:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-07-12 03:58:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 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 03:58:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-07-12 03:58:06,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2022-07-12 03:58:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:06,252 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-07-12 03:58:06,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 03:58:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-07-12 03:58:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 03:58:06,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:06,253 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:06,269 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 03:58:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 03:58:06,468 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2022-07-12 03:58:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727637582] [2022-07-12 03:58:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727637582] [2022-07-12 03:58:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727637582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528853758] [2022-07-12 03:58:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:06,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:06,637 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 03:58:06,638 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 03:58:06,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-12 03:58:06,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 03:58:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:06,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528853758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:06,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:06,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-12 03:58:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843921683] [2022-07-12 03:58:06,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:06,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 03:58:06,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 03:58:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:58:06,978 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:07,154 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-12 03:58:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 03:58:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 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 03:58:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:07,155 INFO L225 Difference]: With dead ends: 79 [2022-07-12 03:58:07,155 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 03:58:07,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 03:58:07,156 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:07,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 03:58:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 03:58:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 03:58:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-12 03:58:07,160 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2022-07-12 03:58:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:07,160 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-12 03:58:07,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-12 03:58:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 03:58:07,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:07,161 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:07,178 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 03:58:07,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:07,375 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2022-07-12 03:58:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:07,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997609838] [2022-07-12 03:58:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:07,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997609838] [2022-07-12 03:58:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997609838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922292961] [2022-07-12 03:58:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:07,496 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 03:58:07,498 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 03:58:07,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 03:58:07,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 03:58:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922292961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:07,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:07,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-07-12 03:58:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316388872] [2022-07-12 03:58:07,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 03:58:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 03:58:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-07-12 03:58:07,665 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 03:58:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:07,790 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-12 03:58:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:58:07,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 44 [2022-07-12 03:58:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:07,791 INFO L225 Difference]: With dead ends: 56 [2022-07-12 03:58:07,791 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 03:58:07,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-07-12 03:58:07,792 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:07,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 03:58:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-07-12 03:58:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 03:58:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-07-12 03:58:07,797 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-07-12 03:58:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:07,797 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-07-12 03:58:07,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 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 03:58:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-07-12 03:58:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 03:58:07,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:07,798 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:07,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:08,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:08,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2022-07-12 03:58:08,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:08,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309304263] [2022-07-12 03:58:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:08,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309304263] [2022-07-12 03:58:08,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309304263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:08,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478601857] [2022-07-12 03:58:08,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:08,194 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 03:58:08,215 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 03:58:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 03:58:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478601857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:08,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-07-12 03:58:08,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972884634] [2022-07-12 03:58:08,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 03:58:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 03:58:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:58:08,562 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 03:58:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:08,787 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-12 03:58:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 03:58:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) Word has length 47 [2022-07-12 03:58:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:08,788 INFO L225 Difference]: With dead ends: 86 [2022-07-12 03:58:08,788 INFO L226 Difference]: Without dead ends: 49 [2022-07-12 03:58:08,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 03:58:08,789 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:08,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-12 03:58:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-12 03:58:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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 03:58:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-12 03:58:08,795 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2022-07-12 03:58:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:08,795 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-12 03:58:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 03:58:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-12 03:58:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 03:58:08,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:08,796 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:08,823 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 03:58:09,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 03:58:09,012 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2022-07-12 03:58:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:09,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067019072] [2022-07-12 03:58:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067019072] [2022-07-12 03:58:09,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067019072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580567676] [2022-07-12 03:58:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:09,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:09,114 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 03:58:09,114 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 03:58:09,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:09,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 03:58:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580567676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:09,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:09,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-07-12 03:58:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241546951] [2022-07-12 03:58:09,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:09,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 03:58:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 03:58:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-07-12 03:58:09,280 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 03:58:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:09,422 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-07-12 03:58:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:58:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 48 [2022-07-12 03:58:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:09,424 INFO L225 Difference]: With dead ends: 60 [2022-07-12 03:58:09,424 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 03:58:09,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:58:09,425 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:09,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 03:58:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-07-12 03:58:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 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 03:58:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-07-12 03:58:09,429 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2022-07-12 03:58:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:09,431 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-07-12 03:58:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 03:58:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-07-12 03:58:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 03:58:09,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:09,432 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:09,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 03:58:09,649 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2022-07-12 03:58:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474507512] [2022-07-12 03:58:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:09,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474507512] [2022-07-12 03:58:09,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474507512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:09,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886239361] [2022-07-12 03:58:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:09,881 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 03:58:09,903 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 03:58:09,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-12 03:58:09,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 03:58:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886239361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:10,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:10,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-07-12 03:58:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442108892] [2022-07-12 03:58:10,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 03:58:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:10,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 03:58:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:58:10,334 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:10,561 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-07-12 03:58:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 03:58:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2022-07-12 03:58:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:10,562 INFO L225 Difference]: With dead ends: 93 [2022-07-12 03:58:10,562 INFO L226 Difference]: Without dead ends: 53 [2022-07-12 03:58:10,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 03:58:10,563 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:10,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 152 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-12 03:58:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-12 03:58:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 03:58:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-12 03:58:10,572 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2022-07-12 03:58:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-12 03:58:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-12 03:58:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 03:58:10,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:10,573 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:10,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 03:58:10,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:10,773 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2022-07-12 03:58:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:10,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584591134] [2022-07-12 03:58:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:10,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:10,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584591134] [2022-07-12 03:58:10,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584591134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:10,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193654784] [2022-07-12 03:58:10,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:10,888 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 03:58:10,889 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 03:58:10,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 03:58:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:10,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193654784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:11,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:11,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-07-12 03:58:11,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790961432] [2022-07-12 03:58:11,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:11,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 03:58:11,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 03:58:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-07-12 03:58:11,066 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 03:58:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:11,220 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-07-12 03:58:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 03:58:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 52 [2022-07-12 03:58:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:11,221 INFO L225 Difference]: With dead ends: 64 [2022-07-12 03:58:11,221 INFO L226 Difference]: Without dead ends: 62 [2022-07-12 03:58:11,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-07-12 03:58:11,222 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-12 03:58:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-12 03:58:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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 03:58:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-12 03:58:11,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2022-07-12 03:58:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:11,226 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-12 03:58:11,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 03:58:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-12 03:58:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 03:58:11,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:11,227 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:11,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 03:58:11,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:11,427 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2022-07-12 03:58:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:11,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675580368] [2022-07-12 03:58:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:11,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:11,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675580368] [2022-07-12 03:58:11,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675580368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5021837] [2022-07-12 03:58:11,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:11,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:11,674 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 03:58:11,675 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 03:58:11,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-12 03:58:11,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 03:58:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5021837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:12,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:12,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-07-12 03:58:12,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601455645] [2022-07-12 03:58:12,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:12,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 03:58:12,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:12,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 03:58:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:12,143 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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) [2022-07-12 03:58:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:12,368 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-12 03:58:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 03:58:12,369 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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) Word has length 55 [2022-07-12 03:58:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:12,369 INFO L225 Difference]: With dead ends: 100 [2022-07-12 03:58:12,369 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 03:58:12,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 03:58:12,370 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:12,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 03:58:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 03:58:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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 03:58:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-12 03:58:12,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2022-07-12 03:58:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:12,375 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-12 03:58:12,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 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) [2022-07-12 03:58:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-12 03:58:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 03:58:12,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:12,376 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:12,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-12 03:58:12,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 03:58:12,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2022-07-12 03:58:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:12,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870438205] [2022-07-12 03:58:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870438205] [2022-07-12 03:58:12,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870438205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098884491] [2022-07-12 03:58:12,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:12,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:12,712 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 03:58:12,713 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 03:58:12,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 03:58:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 03:58:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098884491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:12,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:12,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-07-12 03:58:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278313294] [2022-07-12 03:58:12,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 03:58:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 03:58:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-07-12 03:58:12,917 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 03:58:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:13,084 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-12 03:58:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 03:58:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 56 [2022-07-12 03:58:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:13,084 INFO L225 Difference]: With dead ends: 68 [2022-07-12 03:58:13,085 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 03:58:13,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 03:58:13,085 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:13,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 26 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 03:58:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-12 03:58:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 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 03:58:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-12 03:58:13,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-07-12 03:58:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:13,090 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-12 03:58:13,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 03:58:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-12 03:58:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 03:58:13,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:13,090 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:13,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:13,291 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,SelfDestructingSolverStorable25 [2022-07-12 03:58:13,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2022-07-12 03:58:13,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:13,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405794685] [2022-07-12 03:58:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:13,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:13,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405794685] [2022-07-12 03:58:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405794685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250126164] [2022-07-12 03:58:13,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:13,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:13,564 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 03:58:13,565 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 03:58:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 03:58:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:13,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250126164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:14,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:14,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-12 03:58:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107388509] [2022-07-12 03:58:14,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:14,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 03:58:14,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 03:58:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 03:58:14,073 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:14,327 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-07-12 03:58:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 03:58:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 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 59 [2022-07-12 03:58:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:14,328 INFO L225 Difference]: With dead ends: 107 [2022-07-12 03:58:14,328 INFO L226 Difference]: Without dead ends: 61 [2022-07-12 03:58:14,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 03:58:14,329 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:14,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-12 03:58:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-12 03:58:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 03:58:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-12 03:58:14,333 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2022-07-12 03:58:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:14,333 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-12 03:58:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-12 03:58:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 03:58:14,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:14,334 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:14,547 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,SelfDestructingSolverStorable26 [2022-07-12 03:58:14,547 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2022-07-12 03:58:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742864203] [2022-07-12 03:58:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742864203] [2022-07-12 03:58:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742864203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893557059] [2022-07-12 03:58:14,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:14,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:14,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:14,701 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 03:58:14,702 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 03:58:14,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 03:58:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893557059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:14,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:14,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-07-12 03:58:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947734776] [2022-07-12 03:58:14,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:14,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 03:58:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 03:58:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:58:14,881 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 03:58:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:15,067 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-07-12 03:58:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 60 [2022-07-12 03:58:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:15,068 INFO L225 Difference]: With dead ends: 72 [2022-07-12 03:58:15,068 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 03:58:15,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 03:58:15,069 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 30 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 03:58:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-07-12 03:58:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 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 03:58:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-12 03:58:15,073 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2022-07-12 03:58:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:15,073 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-12 03:58:15,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 03:58:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-12 03:58:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 03:58:15,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:15,074 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:15,092 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 03:58:15,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 03:58:15,290 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2022-07-12 03:58:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:15,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943915193] [2022-07-12 03:58:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:15,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943915193] [2022-07-12 03:58:15,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943915193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433155384] [2022-07-12 03:58:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:15,578 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 03:58:15,578 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 03:58:15,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-12 03:58:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 03:58:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433155384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:16,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:16,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-12 03:58:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101697660] [2022-07-12 03:58:16,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 03:58:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 03:58:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 03:58:16,121 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 03:58:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:16,403 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-07-12 03:58:16,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 03:58:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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) Word has length 63 [2022-07-12 03:58:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:16,404 INFO L225 Difference]: With dead ends: 114 [2022-07-12 03:58:16,404 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 03:58:16,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 03:58:16,405 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:16,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 147 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 03:58:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-12 03:58:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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 03:58:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-12 03:58:16,410 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2022-07-12 03:58:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:16,410 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-12 03:58:16,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 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 03:58:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-12 03:58:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 03:58:16,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:16,411 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:16,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 03:58:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 03:58:16,615 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2022-07-12 03:58:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412644989] [2022-07-12 03:58:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:16,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412644989] [2022-07-12 03:58:16,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412644989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145646650] [2022-07-12 03:58:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:16,750 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 03:58:16,751 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 03:58:16,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:16,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 03:58:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:16,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145646650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:16,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:16,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-07-12 03:58:16,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196785714] [2022-07-12 03:58:16,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:16,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 03:58:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 03:58:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-07-12 03:58:16,933 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 03:58:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:17,123 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-12 03:58:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 03:58:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 64 [2022-07-12 03:58:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:17,124 INFO L225 Difference]: With dead ends: 76 [2022-07-12 03:58:17,124 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 03:58:17,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:58:17,125 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:17,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 03:58:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-07-12 03:58:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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 03:58:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-07-12 03:58:17,130 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-07-12 03:58:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:17,130 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-07-12 03:58:17,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 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 03:58:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-07-12 03:58:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 03:58:17,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:17,131 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:17,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:17,335 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2022-07-12 03:58:17,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:17,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438281705] [2022-07-12 03:58:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:17,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:17,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438281705] [2022-07-12 03:58:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438281705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195994315] [2022-07-12 03:58:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:17,688 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 03:58:17,689 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 03:58:17,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-12 03:58:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 03:58:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195994315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:18,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-12 03:58:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406084423] [2022-07-12 03:58:18,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 03:58:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 03:58:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 03:58:18,273 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:18,605 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-07-12 03:58:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 03:58:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 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 67 [2022-07-12 03:58:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:18,607 INFO L225 Difference]: With dead ends: 121 [2022-07-12 03:58:18,607 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 03:58:18,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 03:58:18,609 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:18,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 192 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 03:58:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-12 03:58:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 03:58:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-12 03:58:18,614 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2022-07-12 03:58:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:18,614 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-12 03:58:18,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-12 03:58:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 03:58:18,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:18,615 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:18,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-12 03:58:18,827 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,SelfDestructingSolverStorable30 [2022-07-12 03:58:18,827 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2022-07-12 03:58:18,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463784908] [2022-07-12 03:58:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:18,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463784908] [2022-07-12 03:58:18,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463784908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254921901] [2022-07-12 03:58:18,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:18,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:18,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:18,987 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 03:58:18,987 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 03:58:19,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-12 03:58:19,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 03:58:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:19,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254921901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:19,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-07-12 03:58:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653940933] [2022-07-12 03:58:19,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 03:58:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 03:58:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2022-07-12 03:58:19,211 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 03:58:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:19,408 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-12 03:58:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 68 [2022-07-12 03:58:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:19,409 INFO L225 Difference]: With dead ends: 80 [2022-07-12 03:58:19,409 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 03:58:19,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 03:58:19,410 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:19,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 03:58:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-12 03:58:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-12 03:58:19,416 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2022-07-12 03:58:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:19,416 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-12 03:58:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 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 03:58:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-12 03:58:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 03:58:19,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:19,417 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:19,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-12 03:58:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:19,623 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2022-07-12 03:58:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:19,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065778614] [2022-07-12 03:58:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065778614] [2022-07-12 03:58:20,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065778614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265363900] [2022-07-12 03:58:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:20,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:20,012 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 03:58:20,013 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 03:58:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 03:58:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:20,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:20,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265363900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:20,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:20,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2022-07-12 03:58:20,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64670254] [2022-07-12 03:58:20,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 03:58:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 03:58:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 03:58:20,702 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:21,050 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-07-12 03:58:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 03:58:21,050 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 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 71 [2022-07-12 03:58:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:21,051 INFO L225 Difference]: With dead ends: 128 [2022-07-12 03:58:21,051 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 03:58:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1223, Invalid=4179, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 03:58:21,052 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:21,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 185 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 03:58:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-12 03:58:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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 03:58:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-12 03:58:21,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2022-07-12 03:58:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:21,058 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-12 03:58:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-12 03:58:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 03:58:21,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:21,059 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:21,075 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 03:58:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:21,259 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2022-07-12 03:58:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:21,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973640714] [2022-07-12 03:58:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973640714] [2022-07-12 03:58:21,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973640714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882426708] [2022-07-12 03:58:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:21,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:21,434 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 03:58:21,435 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 03:58:21,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:21,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 03:58:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:21,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882426708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:21,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:21,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-07-12 03:58:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591955146] [2022-07-12 03:58:21,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 03:58:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 03:58:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:58:21,653 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:21,880 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-07-12 03:58:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 03:58:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 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 72 [2022-07-12 03:58:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:21,880 INFO L225 Difference]: With dead ends: 84 [2022-07-12 03:58:21,880 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 03:58:21,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 03:58:21,881 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:21,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 03:58:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-12 03:58:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-12 03:58:21,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2022-07-12 03:58:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:21,888 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-12 03:58:21,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-12 03:58:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 03:58:21,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:21,888 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:21,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-12 03:58:22,094 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,SelfDestructingSolverStorable33 [2022-07-12 03:58:22,094 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2022-07-12 03:58:22,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:22,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293790056] [2022-07-12 03:58:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:22,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293790056] [2022-07-12 03:58:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293790056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783775921] [2022-07-12 03:58:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:22,508 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 03:58:22,509 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 03:58:22,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-12 03:58:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 03:58:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:23,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:23,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783775921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:23,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:23,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2022-07-12 03:58:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757369476] [2022-07-12 03:58:23,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:23,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 03:58:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 03:58:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 03:58:23,335 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:23,953 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-07-12 03:58:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 03:58:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 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 75 [2022-07-12 03:58:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:23,954 INFO L225 Difference]: With dead ends: 135 [2022-07-12 03:58:23,954 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 03:58:23,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 03:58:23,955 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:23,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 206 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 03:58:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 03:58:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-07-12 03:58:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-12 03:58:23,962 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2022-07-12 03:58:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:23,962 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-12 03:58:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-12 03:58:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 03:58:23,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:23,963 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:23,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-12 03:58:24,176 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2022-07-12 03:58:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:24,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492089180] [2022-07-12 03:58:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:24,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492089180] [2022-07-12 03:58:24,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492089180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882713988] [2022-07-12 03:58:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:24,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:24,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:24,371 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 03:58:24,372 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 03:58:24,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 03:58:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882713988] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:24,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:24,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2022-07-12 03:58:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713760838] [2022-07-12 03:58:24,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:24,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 03:58:24,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 03:58:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2022-07-12 03:58:24,631 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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 03:58:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:24,894 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-07-12 03:58:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 03:58:24,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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) Word has length 76 [2022-07-12 03:58:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:24,895 INFO L225 Difference]: With dead ends: 88 [2022-07-12 03:58:24,896 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 03:58:24,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:58:24,896 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 31 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 03:58:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-12 03:58:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-07-12 03:58:24,906 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2022-07-12 03:58:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:24,906 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-07-12 03:58:24,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 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 03:58:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-07-12 03:58:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 03:58:24,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:24,907 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:24,930 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 03:58:25,123 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,SelfDestructingSolverStorable35 [2022-07-12 03:58:25,123 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2022-07-12 03:58:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:25,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742286015] [2022-07-12 03:58:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:25,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742286015] [2022-07-12 03:58:25,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742286015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500056639] [2022-07-12 03:58:25,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:25,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:25,571 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 03:58:25,572 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 03:58:25,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-12 03:58:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:25,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 03:58:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:26,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:26,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500056639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:26,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:26,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2022-07-12 03:58:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369190039] [2022-07-12 03:58:26,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-12 03:58:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-12 03:58:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 03:58:26,324 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:26,736 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-07-12 03:58:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 03:58:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 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 79 [2022-07-12 03:58:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:26,737 INFO L225 Difference]: With dead ends: 142 [2022-07-12 03:58:26,737 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 03:58:26,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 03:58:26,738 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:26,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 235 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 03:58:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-12 03:58:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 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 03:58:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-07-12 03:58:26,745 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2022-07-12 03:58:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-07-12 03:58:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-07-12 03:58:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 03:58:26,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:26,746 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:26,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:26,956 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2022-07-12 03:58:26,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:26,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342630066] [2022-07-12 03:58:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342630066] [2022-07-12 03:58:27,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342630066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818308791] [2022-07-12 03:58:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:27,149 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 03:58:27,150 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 03:58:27,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-12 03:58:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 03:58:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:27,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818308791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:27,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:27,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2022-07-12 03:58:27,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846887054] [2022-07-12 03:58:27,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:27,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 03:58:27,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 03:58:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:58:27,377 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 03:58:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:27,623 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-07-12 03:58:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 03:58:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 80 [2022-07-12 03:58:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:27,625 INFO L225 Difference]: With dead ends: 92 [2022-07-12 03:58:27,625 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 03:58:27,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 03:58:27,626 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:27,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 23 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 03:58:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-12 03:58:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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 03:58:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-07-12 03:58:27,642 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2022-07-12 03:58:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:27,642 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-07-12 03:58:27,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 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 03:58:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-07-12 03:58:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 03:58:27,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:27,643 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:27,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 03:58:27,844 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2022-07-12 03:58:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658210292] [2022-07-12 03:58:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:28,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658210292] [2022-07-12 03:58:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658210292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476321431] [2022-07-12 03:58:28,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:28,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:28,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:28,319 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 03:58:28,320 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 03:58:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 03:58:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476321431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:29,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2022-07-12 03:58:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580833874] [2022-07-12 03:58:29,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 03:58:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 03:58:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 03:58:29,203 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:29,626 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-07-12 03:58:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 03:58:29,626 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 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 83 [2022-07-12 03:58:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:29,626 INFO L225 Difference]: With dead ends: 149 [2022-07-12 03:58:29,627 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 03:58:29,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 03:58:29,628 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:29,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 210 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 03:58:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-12 03:58:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 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 03:58:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-12 03:58:29,637 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2022-07-12 03:58:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:29,637 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-12 03:58:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-12 03:58:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 03:58:29,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:29,638 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:29,653 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 03:58:29,838 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,SelfDestructingSolverStorable38 [2022-07-12 03:58:29,838 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2022-07-12 03:58:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522605335] [2022-07-12 03:58:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522605335] [2022-07-12 03:58:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522605335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285069940] [2022-07-12 03:58:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:30,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:30,052 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 03:58:30,056 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 03:58:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 03:58:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285069940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:30,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:30,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-07-12 03:58:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241005793] [2022-07-12 03:58:30,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 03:58:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 03:58:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-07-12 03:58:30,293 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:30,549 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-07-12 03:58:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:58:30,550 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 84 [2022-07-12 03:58:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:30,550 INFO L225 Difference]: With dead ends: 96 [2022-07-12 03:58:30,550 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 03:58:30,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 03:58:30,551 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:30,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 27 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 03:58:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-07-12 03:58:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 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 03:58:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-12 03:58:30,559 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2022-07-12 03:58:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:30,559 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-12 03:58:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-12 03:58:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-12 03:58:30,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:30,560 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:30,576 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 03:58:30,776 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,SelfDestructingSolverStorable39 [2022-07-12 03:58:30,776 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2022-07-12 03:58:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:30,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522183545] [2022-07-12 03:58:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522183545] [2022-07-12 03:58:31,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522183545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983427833] [2022-07-12 03:58:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:31,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:31,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:31,297 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 03:58:31,298 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 03:58:31,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-07-12 03:58:31,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 03:58:31,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:32,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:32,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983427833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:32,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:32,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2022-07-12 03:58:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791656664] [2022-07-12 03:58:32,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:32,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 03:58:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 03:58:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 03:58:32,215 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:32,707 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-12 03:58:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 03:58:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 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 87 [2022-07-12 03:58:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:32,707 INFO L225 Difference]: With dead ends: 156 [2022-07-12 03:58:32,707 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 03:58:32,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1801, Invalid=6209, Unknown=0, NotChecked=0, Total=8010 [2022-07-12 03:58:32,708 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:32,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 243 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 03:58:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-12 03:58:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-12 03:58:32,716 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2022-07-12 03:58:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:32,716 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-12 03:58:32,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-12 03:58:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 03:58:32,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:32,717 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:32,737 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 03:58:32,934 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,SelfDestructingSolverStorable40 [2022-07-12 03:58:32,934 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2022-07-12 03:58:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477227141] [2022-07-12 03:58:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:32,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477227141] [2022-07-12 03:58:33,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477227141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653641882] [2022-07-12 03:58:33,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:33,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:33,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:33,169 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 03:58:33,170 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 03:58:33,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 03:58:33,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:33,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653641882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:33,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:33,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2022-07-12 03:58:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353773212] [2022-07-12 03:58:33,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 03:58:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 03:58:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-07-12 03:58:33,425 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:33,709 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-07-12 03:58:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 03:58:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 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 88 [2022-07-12 03:58:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:33,710 INFO L225 Difference]: With dead ends: 100 [2022-07-12 03:58:33,710 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 03:58:33,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 03:58:33,711 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:33,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 03:58:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2022-07-12 03:58:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-12 03:58:33,720 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2022-07-12 03:58:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:33,720 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-12 03:58:33,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-12 03:58:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 03:58:33,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:33,721 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:33,738 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 03:58:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:33,922 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2022-07-12 03:58:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70426026] [2022-07-12 03:58:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:34,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70426026] [2022-07-12 03:58:34,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70426026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:34,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946573586] [2022-07-12 03:58:34,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:34,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:34,511 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 03:58:34,512 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 03:58:34,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-12 03:58:34,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 03:58:34,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:35,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946573586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:35,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:35,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2022-07-12 03:58:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991774567] [2022-07-12 03:58:35,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-12 03:58:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-12 03:58:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=3838, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 03:58:35,457 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:35,927 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2022-07-12 03:58:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 03:58:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 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 91 [2022-07-12 03:58:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:35,927 INFO L225 Difference]: With dead ends: 163 [2022-07-12 03:58:35,927 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 03:58:35,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1963, Invalid=6779, Unknown=0, NotChecked=0, Total=8742 [2022-07-12 03:58:35,928 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:35,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 03:58:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-12 03:58:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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 03:58:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-12 03:58:35,937 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-07-12 03:58:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:35,937 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-12 03:58:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-12 03:58:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 03:58:35,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:35,938 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:35,957 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 03:58:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:36,155 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2022-07-12 03:58:36,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:36,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120161222] [2022-07-12 03:58:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:36,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:36,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120161222] [2022-07-12 03:58:36,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120161222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:36,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405138984] [2022-07-12 03:58:36,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:36,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:36,402 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 03:58:36,413 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 03:58:36,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-12 03:58:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 03:58:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:36,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405138984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:36,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:36,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2022-07-12 03:58:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700564579] [2022-07-12 03:58:36,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 03:58:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 03:58:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2022-07-12 03:58:36,679 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 03:58:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:36,992 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-07-12 03:58:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 03:58:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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) Word has length 92 [2022-07-12 03:58:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:36,993 INFO L225 Difference]: With dead ends: 104 [2022-07-12 03:58:36,993 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 03:58:36,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 03:58:36,993 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:36,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 32 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 03:58:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-07-12 03:58:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-12 03:58:37,004 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-07-12 03:58:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:37,004 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-12 03:58:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 03:58:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-12 03:58:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-12 03:58:37,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:37,005 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:37,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-12 03:58:37,209 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,SelfDestructingSolverStorable43 [2022-07-12 03:58:37,209 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2022-07-12 03:58:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696679645] [2022-07-12 03:58:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:37,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696679645] [2022-07-12 03:58:37,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696679645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477486351] [2022-07-12 03:58:37,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:37,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:37,871 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 03:58:37,872 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 03:58:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 03:58:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:38,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477486351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:38,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:38,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2022-07-12 03:58:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863485885] [2022-07-12 03:58:38,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-12 03:58:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-12 03:58:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=4173, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 03:58:38,982 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:39,635 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-12 03:58:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 03:58:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2022-07-12 03:58:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:39,636 INFO L225 Difference]: With dead ends: 170 [2022-07-12 03:58:39,636 INFO L226 Difference]: Without dead ends: 97 [2022-07-12 03:58:39,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2132, Invalid=7374, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 03:58:39,637 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:39,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 305 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-12 03:58:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-12 03:58:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-07-12 03:58:39,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2022-07-12 03:58:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:39,651 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-07-12 03:58:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-07-12 03:58:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 03:58:39,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:39,664 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:39,687 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 03:58:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 03:58:39,864 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2022-07-12 03:58:39,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5207253] [2022-07-12 03:58:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:39,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5207253] [2022-07-12 03:58:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5207253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918952302] [2022-07-12 03:58:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:40,177 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 03:58:40,178 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 03:58:40,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:40,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 03:58:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:40,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:40,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918952302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:40,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:40,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2022-07-12 03:58:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052672583] [2022-07-12 03:58:40,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 03:58:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 03:58:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2022-07-12 03:58:40,475 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:40,832 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2022-07-12 03:58:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 03:58:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 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 96 [2022-07-12 03:58:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:40,833 INFO L225 Difference]: With dead ends: 108 [2022-07-12 03:58:40,833 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 03:58:40,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 03:58:40,834 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:40,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 03:58:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2022-07-12 03:58:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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 03:58:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-12 03:58:40,848 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2022-07-12 03:58:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:40,848 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-12 03:58:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-12 03:58:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 03:58:40,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:40,849 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:40,873 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 03:58:41,073 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,SelfDestructingSolverStorable45 [2022-07-12 03:58:41,073 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2022-07-12 03:58:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998330552] [2022-07-12 03:58:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998330552] [2022-07-12 03:58:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998330552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919268597] [2022-07-12 03:58:41,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:41,804 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 03:58:41,805 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 03:58:41,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-12 03:58:41,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 03:58:41,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:42,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:43,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919268597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:43,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:43,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2022-07-12 03:58:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165197164] [2022-07-12 03:58:43,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-12 03:58:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-12 03:58:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=4522, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 03:58:43,013 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:43,702 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-07-12 03:58:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 03:58:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 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 99 [2022-07-12 03:58:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:43,702 INFO L225 Difference]: With dead ends: 177 [2022-07-12 03:58:43,702 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 03:58:43,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2308, Invalid=7994, Unknown=0, NotChecked=0, Total=10302 [2022-07-12 03:58:43,704 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:43,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 335 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 03:58:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-12 03:58:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-12 03:58:43,718 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2022-07-12 03:58:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:43,719 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-12 03:58:43,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-12 03:58:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 03:58:43,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:43,720 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:43,744 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 03:58:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:43,933 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2022-07-12 03:58:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:43,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301159234] [2022-07-12 03:58:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301159234] [2022-07-12 03:58:44,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301159234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006840607] [2022-07-12 03:58:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:44,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:44,272 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 03:58:44,273 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 03:58:44,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:44,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 03:58:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006840607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:44,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:44,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2022-07-12 03:58:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005778238] [2022-07-12 03:58:44,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 03:58:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 03:58:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2022-07-12 03:58:44,631 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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 03:58:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:44,968 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-07-12 03:58:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 03:58:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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) Word has length 100 [2022-07-12 03:58:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:44,975 INFO L225 Difference]: With dead ends: 112 [2022-07-12 03:58:44,975 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 03:58:44,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 03:58:44,976 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:44,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 25 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 03:58:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-07-12 03:58:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-07-12 03:58:44,989 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2022-07-12 03:58:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:44,989 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-07-12 03:58:44,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 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 03:58:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-07-12 03:58:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-12 03:58:44,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:44,990 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:45,008 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 03:58:45,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 03:58:45,199 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2022-07-12 03:58:45,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:45,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884721371] [2022-07-12 03:58:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:45,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:45,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:45,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884721371] [2022-07-12 03:58:45,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884721371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:45,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585441824] [2022-07-12 03:58:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:45,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:45,911 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 03:58:45,911 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 03:58:45,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-12 03:58:45,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 03:58:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:46,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585441824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:47,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2022-07-12 03:58:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666655406] [2022-07-12 03:58:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-12 03:58:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-12 03:58:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 03:58:47,046 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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 03:58:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:47,694 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-07-12 03:58:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 03:58:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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) Word has length 103 [2022-07-12 03:58:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:47,695 INFO L225 Difference]: With dead ends: 184 [2022-07-12 03:58:47,695 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 03:58:47,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2491, Invalid=8639, Unknown=0, NotChecked=0, Total=11130 [2022-07-12 03:58:47,696 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:47,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 314 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 03:58:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-12 03:58:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-12 03:58:47,717 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2022-07-12 03:58:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:47,717 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-12 03:58:47,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 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 03:58:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-12 03:58:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 03:58:47,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:47,717 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:47,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-12 03:58:47,918 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,SelfDestructingSolverStorable48 [2022-07-12 03:58:47,919 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2022-07-12 03:58:47,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:47,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781783879] [2022-07-12 03:58:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:47,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781783879] [2022-07-12 03:58:48,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781783879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344711853] [2022-07-12 03:58:48,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:58:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:48,219 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 03:58:48,220 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 03:58:48,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-12 03:58:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 03:58:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344711853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:48,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2022-07-12 03:58:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676807257] [2022-07-12 03:58:48,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:48,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 03:58:48,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 03:58:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2022-07-12 03:58:48,522 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 03:58:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:48,861 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2022-07-12 03:58:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 03:58:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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) Word has length 104 [2022-07-12 03:58:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:48,862 INFO L225 Difference]: With dead ends: 116 [2022-07-12 03:58:48,862 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 03:58:48,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 03:58:48,863 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:48,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 35 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 03:58:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-07-12 03:58:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 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 03:58:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-07-12 03:58:48,874 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-07-12 03:58:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:48,874 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-07-12 03:58:48,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 03:58:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-07-12 03:58:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-12 03:58:48,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:48,875 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:48,896 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 03:58:49,087 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,SelfDestructingSolverStorable49 [2022-07-12 03:58:49,087 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2022-07-12 03:58:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:49,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248663772] [2022-07-12 03:58:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:49,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248663772] [2022-07-12 03:58:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248663772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078127686] [2022-07-12 03:58:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:58:49,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:49,812 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 03:58:49,813 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 03:58:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 03:58:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:50,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:51,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078127686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:51,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:51,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2022-07-12 03:58:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105021221] [2022-07-12 03:58:51,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:51,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-12 03:58:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-12 03:58:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=5262, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 03:58:51,082 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:51,719 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2022-07-12 03:58:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 03:58:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 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 107 [2022-07-12 03:58:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:51,720 INFO L225 Difference]: With dead ends: 191 [2022-07-12 03:58:51,720 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 03:58:51,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2681, Invalid=9309, Unknown=0, NotChecked=0, Total=11990 [2022-07-12 03:58:51,721 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:51,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 271 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 03:58:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-12 03:58:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-12 03:58:51,734 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2022-07-12 03:58:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:51,734 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-12 03:58:51,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-12 03:58:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 03:58:51,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:51,735 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:51,752 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 03:58:51,947 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,SelfDestructingSolverStorable50 [2022-07-12 03:58:51,947 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2022-07-12 03:58:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706056175] [2022-07-12 03:58:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706056175] [2022-07-12 03:58:52,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706056175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912105626] [2022-07-12 03:58:52,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:58:52,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:52,249 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 03:58:52,249 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 03:58:52,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:58:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 03:58:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912105626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:52,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:52,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2022-07-12 03:58:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202902438] [2022-07-12 03:58:52,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 03:58:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 03:58:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2022-07-12 03:58:52,542 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:52,919 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-07-12 03:58:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:58:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 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 108 [2022-07-12 03:58:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:52,920 INFO L225 Difference]: With dead ends: 120 [2022-07-12 03:58:52,920 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 03:58:52,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 03:58:52,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:52,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 03:58:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-07-12 03:58:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 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 03:58:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-07-12 03:58:52,939 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2022-07-12 03:58:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:52,939 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-07-12 03:58:52,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-07-12 03:58:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 03:58:52,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:52,940 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:52,957 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 03:58:53,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:53,157 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2022-07-12 03:58:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281868027] [2022-07-12 03:58:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:53,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281868027] [2022-07-12 03:58:53,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281868027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050214990] [2022-07-12 03:58:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:58:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:53,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:53,985 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 03:58:53,986 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 03:58:54,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-07-12 03:58:54,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 03:58:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050214990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:55,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:55,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2022-07-12 03:58:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165731426] [2022-07-12 03:58:55,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-12 03:58:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-12 03:58:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=5653, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 03:58:55,326 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 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 03:58:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:56,029 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-07-12 03:58:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 03:58:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 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) Word has length 111 [2022-07-12 03:58:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:56,030 INFO L225 Difference]: With dead ends: 198 [2022-07-12 03:58:56,030 INFO L226 Difference]: Without dead ends: 113 [2022-07-12 03:58:56,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2878, Invalid=10004, Unknown=0, NotChecked=0, Total=12882 [2022-07-12 03:58:56,031 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:56,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 381 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:58:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-12 03:58:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-07-12 03:58:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-07-12 03:58:56,045 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2022-07-12 03:58:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:56,045 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-07-12 03:58:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 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 03:58:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-07-12 03:58:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 03:58:56,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:56,046 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:56,065 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 03:58:56,259 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,SelfDestructingSolverStorable52 [2022-07-12 03:58:56,259 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2022-07-12 03:58:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:56,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779551100] [2022-07-12 03:58:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:56,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779551100] [2022-07-12 03:58:56,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779551100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:56,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011070608] [2022-07-12 03:58:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:58:56,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:56,590 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 03:58:56,590 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 03:58:56,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:58:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 03:58:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:56,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:56,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011070608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:56,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:56,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2022-07-12 03:58:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855578530] [2022-07-12 03:58:56,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:56,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 03:58:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 03:58:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 03:58:56,921 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:58:57,319 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2022-07-12 03:58:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 03:58:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-12 03:58:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:58:57,320 INFO L225 Difference]: With dead ends: 124 [2022-07-12 03:58:57,320 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 03:58:57,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 03:58:57,320 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:58:57,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:58:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 03:58:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2022-07-12 03:58:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-07-12 03:58:57,335 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2022-07-12 03:58:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:58:57,335 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-07-12 03:58:57,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:58:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-07-12 03:58:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 03:58:57,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:58:57,336 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2022-07-12 03:58:57,355 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 03:58:57,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:57,553 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:58:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:58:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2022-07-12 03:58:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:58:57,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809419176] [2022-07-12 03:58:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:58:57,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:58:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:58:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:58,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:58:58,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809419176] [2022-07-12 03:58:58,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809419176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:58:58,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836571018] [2022-07-12 03:58:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:58:58,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:58:58,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:58:58,433 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 03:58:58,433 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 03:58:58,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-07-12 03:58:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:58:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-12 03:58:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:58:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:59,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:58:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:58:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836571018] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:58:59,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:58:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2022-07-12 03:58:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048302049] [2022-07-12 03:58:59,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:58:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-12 03:58:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:58:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-12 03:58:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=6058, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 03:58:59,796 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:00,521 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2022-07-12 03:59:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 03:59:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 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 115 [2022-07-12 03:59:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:00,522 INFO L225 Difference]: With dead ends: 205 [2022-07-12 03:59:00,522 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 03:59:00,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3082, Invalid=10724, Unknown=0, NotChecked=0, Total=13806 [2022-07-12 03:59:00,523 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:00,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 346 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 03:59:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-12 03:59:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-12 03:59:00,536 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2022-07-12 03:59:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:00,537 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-12 03:59:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-12 03:59:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 03:59:00,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:00,537 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:00,554 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 03:59:00,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:00,738 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2022-07-12 03:59:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:00,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477017461] [2022-07-12 03:59:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:01,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477017461] [2022-07-12 03:59:01,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477017461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717221110] [2022-07-12 03:59:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:01,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:01,117 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 03:59:01,117 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 03:59:01,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-07-12 03:59:01,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 03:59:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717221110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:01,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:01,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2022-07-12 03:59:01,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234557270] [2022-07-12 03:59:01,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:01,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 03:59:01,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 03:59:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 03:59:01,424 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:01,824 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2022-07-12 03:59:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 03:59:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 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 116 [2022-07-12 03:59:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:01,825 INFO L225 Difference]: With dead ends: 128 [2022-07-12 03:59:01,825 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 03:59:01,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 03:59:01,826 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 31 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 03:59:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2022-07-12 03:59:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-12 03:59:01,848 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-07-12 03:59:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:01,849 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-12 03:59:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-12 03:59:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-12 03:59:01,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:01,849 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:01,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-12 03:59:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:02,050 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2022-07-12 03:59:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:02,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292735596] [2022-07-12 03:59:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292735596] [2022-07-12 03:59:02,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292735596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351008024] [2022-07-12 03:59:02,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:02,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:02,952 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 03:59:02,953 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 03:59:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 03:59:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:04,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:04,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351008024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:04,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:04,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2022-07-12 03:59:04,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763687927] [2022-07-12 03:59:04,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-12 03:59:04,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-12 03:59:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=6477, Unknown=0, NotChecked=0, Total=8372 [2022-07-12 03:59:04,384 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:05,187 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-07-12 03:59:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 03:59:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 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 119 [2022-07-12 03:59:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:05,188 INFO L225 Difference]: With dead ends: 212 [2022-07-12 03:59:05,188 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 03:59:05,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3327 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3293, Invalid=11469, Unknown=0, NotChecked=0, Total=14762 [2022-07-12 03:59:05,189 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:05,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 397 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 03:59:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-12 03:59:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-07-12 03:59:05,205 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2022-07-12 03:59:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:05,205 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-07-12 03:59:05,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-07-12 03:59:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 03:59:05,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:05,206 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:05,223 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 03:59:05,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:05,408 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2022-07-12 03:59:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:05,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143842041] [2022-07-12 03:59:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:05,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:05,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143842041] [2022-07-12 03:59:05,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143842041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347166079] [2022-07-12 03:59:05,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:05,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:05,775 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 03:59:05,776 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 03:59:05,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:05,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 03:59:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:05,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:06,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347166079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:06,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:06,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2022-07-12 03:59:06,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744132521] [2022-07-12 03:59:06,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 03:59:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 03:59:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 03:59:06,078 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:06,490 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-07-12 03:59:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 03:59:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2022-07-12 03:59:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:06,490 INFO L225 Difference]: With dead ends: 132 [2022-07-12 03:59:06,490 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 03:59:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 03:59:06,491 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:06,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 03:59:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-07-12 03:59:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-12 03:59:06,507 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2022-07-12 03:59:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:06,507 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-12 03:59:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-12 03:59:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 03:59:06,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:06,508 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:06,526 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 03:59:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-12 03:59:06,709 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:06,710 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2022-07-12 03:59:06,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:06,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608931166] [2022-07-12 03:59:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:07,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608931166] [2022-07-12 03:59:07,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608931166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067197275] [2022-07-12 03:59:07,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:07,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:07,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:07,647 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 03:59:07,647 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 03:59:07,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-07-12 03:59:07,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 03:59:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:09,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:09,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067197275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:09,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:09,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2022-07-12 03:59:09,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136227926] [2022-07-12 03:59:09,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:09,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-12 03:59:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:09,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-12 03:59:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=6910, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 03:59:09,194 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 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 03:59:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:10,066 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-07-12 03:59:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 03:59:10,066 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 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) Word has length 123 [2022-07-12 03:59:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:10,067 INFO L225 Difference]: With dead ends: 219 [2022-07-12 03:59:10,067 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 03:59:10,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3511, Invalid=12239, Unknown=0, NotChecked=0, Total=15750 [2022-07-12 03:59:10,068 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:10,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 03:59:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-12 03:59:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-07-12 03:59:10,083 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2022-07-12 03:59:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:10,084 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-07-12 03:59:10,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 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 03:59:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-07-12 03:59:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 03:59:10,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:10,084 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:10,102 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 03:59:10,301 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,SelfDestructingSolverStorable58 [2022-07-12 03:59:10,301 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:10,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2022-07-12 03:59:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:10,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813128704] [2022-07-12 03:59:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:10,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:10,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813128704] [2022-07-12 03:59:10,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813128704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123590748] [2022-07-12 03:59:10,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:10,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:10,675 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 03:59:10,676 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 03:59:10,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:10,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 03:59:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:10,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123590748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:10,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:10,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2022-07-12 03:59:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915367933] [2022-07-12 03:59:10,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 03:59:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 03:59:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 03:59:10,997 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:11,421 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-07-12 03:59:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 03:59:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 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 124 [2022-07-12 03:59:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:11,422 INFO L225 Difference]: With dead ends: 136 [2022-07-12 03:59:11,422 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 03:59:11,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 03:59:11,423 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:11,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 28 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 03:59:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2022-07-12 03:59:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-07-12 03:59:11,438 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2022-07-12 03:59:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:11,439 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-07-12 03:59:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-07-12 03:59:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-12 03:59:11,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:11,439 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:11,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:11,639 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,SelfDestructingSolverStorable59 [2022-07-12 03:59:11,640 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2022-07-12 03:59:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615154005] [2022-07-12 03:59:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:12,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:12,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615154005] [2022-07-12 03:59:12,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615154005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:12,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149430958] [2022-07-12 03:59:12,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:12,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:12,678 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 03:59:12,678 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 03:59:12,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-12 03:59:12,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 03:59:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:14,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:14,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149430958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:14,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:14,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2022-07-12 03:59:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180633888] [2022-07-12 03:59:14,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-12 03:59:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-12 03:59:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7357, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 03:59:14,275 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:15,110 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-07-12 03:59:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 03:59:15,110 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 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 127 [2022-07-12 03:59:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:15,110 INFO L225 Difference]: With dead ends: 226 [2022-07-12 03:59:15,110 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 03:59:15,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3736, Invalid=13034, Unknown=0, NotChecked=0, Total=16770 [2022-07-12 03:59:15,111 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:15,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 352 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 03:59:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-12 03:59:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-07-12 03:59:15,128 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2022-07-12 03:59:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:15,128 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-07-12 03:59:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-07-12 03:59:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-12 03:59:15,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:15,129 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:15,146 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 03:59:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:15,335 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2022-07-12 03:59:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153837946] [2022-07-12 03:59:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153837946] [2022-07-12 03:59:15,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153837946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111479347] [2022-07-12 03:59:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:15,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:15,741 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 03:59:15,742 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 03:59:15,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-07-12 03:59:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 03:59:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:16,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111479347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:16,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:16,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2022-07-12 03:59:16,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536182591] [2022-07-12 03:59:16,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:16,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 03:59:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 03:59:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 03:59:16,084 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:16,535 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-07-12 03:59:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 03:59:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 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 128 [2022-07-12 03:59:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:16,536 INFO L225 Difference]: With dead ends: 140 [2022-07-12 03:59:16,536 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 03:59:16,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 03:59:16,537 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:16,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 03:59:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2022-07-12 03:59:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-07-12 03:59:16,554 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-07-12 03:59:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:16,554 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-07-12 03:59:16,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-07-12 03:59:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-12 03:59:16,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:16,554 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:16,571 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 03:59:16,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:16,755 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2022-07-12 03:59:16,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:16,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069236863] [2022-07-12 03:59:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:17,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069236863] [2022-07-12 03:59:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069236863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720309430] [2022-07-12 03:59:17,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:17,809 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 03:59:17,810 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 03:59:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 03:59:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:19,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:19,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720309430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:19,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:19,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2022-07-12 03:59:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939671721] [2022-07-12 03:59:19,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-12 03:59:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-12 03:59:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=7818, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 03:59:19,448 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:20,361 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-07-12 03:59:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 03:59:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 131 [2022-07-12 03:59:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:20,362 INFO L225 Difference]: With dead ends: 233 [2022-07-12 03:59:20,362 INFO L226 Difference]: Without dead ends: 133 [2022-07-12 03:59:20,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3968, Invalid=13854, Unknown=0, NotChecked=0, Total=17822 [2022-07-12 03:59:20,363 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:20,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 387 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-12 03:59:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-12 03:59:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-07-12 03:59:20,381 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2022-07-12 03:59:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:20,381 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-07-12 03:59:20,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-07-12 03:59:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-12 03:59:20,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:20,382 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:20,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-12 03:59:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:20,591 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2022-07-12 03:59:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171106356] [2022-07-12 03:59:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171106356] [2022-07-12 03:59:21,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171106356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729684957] [2022-07-12 03:59:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:21,008 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 03:59:21,008 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 03:59:21,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 03:59:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:21,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:21,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729684957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:21,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:21,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2022-07-12 03:59:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598375138] [2022-07-12 03:59:21,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 03:59:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 03:59:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 03:59:21,404 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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 03:59:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:21,870 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2022-07-12 03:59:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 03:59:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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) Word has length 132 [2022-07-12 03:59:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:21,871 INFO L225 Difference]: With dead ends: 144 [2022-07-12 03:59:21,871 INFO L226 Difference]: Without dead ends: 142 [2022-07-12 03:59:21,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 03:59:21,872 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:21,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 35 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:59:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-12 03:59:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-12 03:59:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-07-12 03:59:21,894 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2022-07-12 03:59:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:21,894 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-07-12 03:59:21,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 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 03:59:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-07-12 03:59:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-12 03:59:21,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:21,895 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:21,911 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 03:59:22,095 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,SelfDestructingSolverStorable63 [2022-07-12 03:59:22,095 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2022-07-12 03:59:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901009759] [2022-07-12 03:59:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:23,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901009759] [2022-07-12 03:59:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901009759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384974080] [2022-07-12 03:59:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:23,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:23,235 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 03:59:23,242 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 03:59:23,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-07-12 03:59:23,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 03:59:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:24,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:25,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384974080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:25,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:25,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2022-07-12 03:59:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809566509] [2022-07-12 03:59:25,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:25,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-12 03:59:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-12 03:59:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=8293, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 03:59:25,061 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:25,971 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2022-07-12 03:59:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 03:59:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 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 135 [2022-07-12 03:59:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:25,971 INFO L225 Difference]: With dead ends: 240 [2022-07-12 03:59:25,971 INFO L226 Difference]: Without dead ends: 137 [2022-07-12 03:59:25,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4207, Invalid=14699, Unknown=0, NotChecked=0, Total=18906 [2022-07-12 03:59:25,972 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:25,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 375 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-12 03:59:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-07-12 03:59:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-07-12 03:59:25,992 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2022-07-12 03:59:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:25,993 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-07-12 03:59:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-07-12 03:59:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-12 03:59:25,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:25,993 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:26,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:26,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:26,197 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2022-07-12 03:59:26,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:26,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384118019] [2022-07-12 03:59:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:26,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384118019] [2022-07-12 03:59:26,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384118019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:26,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396850267] [2022-07-12 03:59:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:26,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:26,648 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 03:59:26,649 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 03:59:26,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:26,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-12 03:59:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:26,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396850267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:26,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:26,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2022-07-12 03:59:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407810220] [2022-07-12 03:59:26,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:26,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 03:59:26,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 03:59:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 03:59:26,985 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:27,480 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2022-07-12 03:59:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 03:59:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 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 136 [2022-07-12 03:59:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:27,481 INFO L225 Difference]: With dead ends: 148 [2022-07-12 03:59:27,481 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 03:59:27,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 03:59:27,482 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 03:59:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-07-12 03:59:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-07-12 03:59:27,503 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2022-07-12 03:59:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:27,503 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-07-12 03:59:27,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-07-12 03:59:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-12 03:59:27,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:27,503 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:27,521 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 03:59:27,704 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,SelfDestructingSolverStorable65 [2022-07-12 03:59:27,704 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2022-07-12 03:59:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507496132] [2022-07-12 03:59:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507496132] [2022-07-12 03:59:28,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507496132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442946948] [2022-07-12 03:59:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:28,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:28,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:28,907 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 03:59:28,909 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 03:59:29,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2022-07-12 03:59:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 03:59:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:30,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:30,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442946948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:30,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:30,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2022-07-12 03:59:30,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439916212] [2022-07-12 03:59:30,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:30,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-12 03:59:30,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-12 03:59:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=8782, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 03:59:30,727 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:31,704 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-07-12 03:59:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 03:59:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 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 139 [2022-07-12 03:59:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:31,705 INFO L225 Difference]: With dead ends: 247 [2022-07-12 03:59:31,705 INFO L226 Difference]: Without dead ends: 141 [2022-07-12 03:59:31,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4453, Invalid=15569, Unknown=0, NotChecked=0, Total=20022 [2022-07-12 03:59:31,706 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:31,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 360 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-12 03:59:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-12 03:59:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-07-12 03:59:31,725 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2022-07-12 03:59:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:31,725 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-07-12 03:59:31,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-07-12 03:59:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-12 03:59:31,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:31,726 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:31,743 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 03:59:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-12 03:59:31,927 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2022-07-12 03:59:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:31,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818907126] [2022-07-12 03:59:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:32,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818907126] [2022-07-12 03:59:32,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818907126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230766750] [2022-07-12 03:59:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:32,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:32,395 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 03:59:32,396 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 03:59:32,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-07-12 03:59:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 03:59:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:32,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230766750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:32,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:32,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2022-07-12 03:59:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919423852] [2022-07-12 03:59:32,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:32,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 03:59:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 03:59:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 03:59:32,793 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:33,311 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-07-12 03:59:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 03:59:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 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 140 [2022-07-12 03:59:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:33,313 INFO L225 Difference]: With dead ends: 152 [2022-07-12 03:59:33,313 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 03:59:33,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2022-07-12 03:59:33,314 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:33,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 34 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 03:59:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2022-07-12 03:59:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-07-12 03:59:33,335 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2022-07-12 03:59:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:33,335 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-07-12 03:59:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-07-12 03:59:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-12 03:59:33,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:33,336 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:33,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-12 03:59:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-12 03:59:33,547 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2022-07-12 03:59:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905535583] [2022-07-12 03:59:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905535583] [2022-07-12 03:59:34,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905535583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827126661] [2022-07-12 03:59:34,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:34,809 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 03:59:34,809 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 03:59:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 03:59:34,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:36,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827126661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:36,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:36,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2022-07-12 03:59:36,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135787438] [2022-07-12 03:59:36,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:36,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-12 03:59:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-12 03:59:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=9285, Unknown=0, NotChecked=0, Total=11990 [2022-07-12 03:59:36,742 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:37,724 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-07-12 03:59:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 03:59:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2022-07-12 03:59:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:37,727 INFO L225 Difference]: With dead ends: 254 [2022-07-12 03:59:37,727 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 03:59:37,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4706, Invalid=16464, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 03:59:37,728 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:37,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 301 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 03:59:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-07-12 03:59:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-07-12 03:59:37,754 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2022-07-12 03:59:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:37,754 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-07-12 03:59:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-07-12 03:59:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-12 03:59:37,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:37,759 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:37,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-12 03:59:37,964 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,SelfDestructingSolverStorable68 [2022-07-12 03:59:37,964 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2022-07-12 03:59:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69082889] [2022-07-12 03:59:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:37,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:38,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:38,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69082889] [2022-07-12 03:59:38,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69082889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:38,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26495700] [2022-07-12 03:59:38,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:38,445 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 03:59:38,446 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 03:59:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 03:59:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:38,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26495700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:38,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2022-07-12 03:59:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102974015] [2022-07-12 03:59:38,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 03:59:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 03:59:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:59:38,832 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:39,418 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2022-07-12 03:59:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 03:59:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 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 144 [2022-07-12 03:59:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:39,418 INFO L225 Difference]: With dead ends: 156 [2022-07-12 03:59:39,419 INFO L226 Difference]: Without dead ends: 154 [2022-07-12 03:59:39,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 03:59:39,419 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:39,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 41 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-12 03:59:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-07-12 03:59:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-12 03:59:39,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2022-07-12 03:59:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:39,441 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-12 03:59:39,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-12 03:59:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 03:59:39,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:39,442 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:39,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:39,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:39,660 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2022-07-12 03:59:39,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338082472] [2022-07-12 03:59:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:39,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:40,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338082472] [2022-07-12 03:59:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338082472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30998034] [2022-07-12 03:59:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 03:59:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:40,995 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 03:59:40,996 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 03:59:41,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-07-12 03:59:41,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 03:59:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:42,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:43,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30998034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:43,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:43,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2022-07-12 03:59:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477018272] [2022-07-12 03:59:43,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-12 03:59:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-12 03:59:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=9802, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 03:59:43,039 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:44,126 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2022-07-12 03:59:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 03:59:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 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 147 [2022-07-12 03:59:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:44,132 INFO L225 Difference]: With dead ends: 261 [2022-07-12 03:59:44,132 INFO L226 Difference]: Without dead ends: 149 [2022-07-12 03:59:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5014 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4966, Invalid=17384, Unknown=0, NotChecked=0, Total=22350 [2022-07-12 03:59:44,133 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:44,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 368 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-12 03:59:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-12 03:59:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-12 03:59:44,156 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2022-07-12 03:59:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:44,156 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-12 03:59:44,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-12 03:59:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 03:59:44,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:44,157 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:44,176 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 03:59:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:44,376 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2022-07-12 03:59:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266881535] [2022-07-12 03:59:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:44,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266881535] [2022-07-12 03:59:44,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266881535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245472662] [2022-07-12 03:59:44,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 03:59:44,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:44,892 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 03:59:44,893 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 03:59:44,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 03:59:44,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 03:59:44,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:45,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:45,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245472662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:45,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:45,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2022-07-12 03:59:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85870298] [2022-07-12 03:59:45,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:45,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 03:59:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 03:59:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 03:59:45,316 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:45,863 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-07-12 03:59:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 03:59:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 148 [2022-07-12 03:59:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:45,864 INFO L225 Difference]: With dead ends: 160 [2022-07-12 03:59:45,864 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 03:59:45,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 03:59:45,865 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:45,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 32 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 03:59:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2022-07-12 03:59:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-12 03:59:45,900 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2022-07-12 03:59:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:45,900 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-12 03:59:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-12 03:59:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 03:59:45,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:45,900 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:45,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:46,101 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2022-07-12 03:59:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176979913] [2022-07-12 03:59:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:47,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:47,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176979913] [2022-07-12 03:59:47,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176979913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:47,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871190458] [2022-07-12 03:59:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 03:59:47,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:47,476 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 03:59:47,476 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 03:59:47,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-07-12 03:59:47,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 03:59:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:49,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:49,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871190458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:49,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:49,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2022-07-12 03:59:49,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135178657] [2022-07-12 03:59:49,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:49,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-12 03:59:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-12 03:59:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=10333, Unknown=0, NotChecked=0, Total=13340 [2022-07-12 03:59:49,597 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:50,789 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2022-07-12 03:59:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-12 03:59:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 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 151 [2022-07-12 03:59:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:50,790 INFO L225 Difference]: With dead ends: 268 [2022-07-12 03:59:50,790 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 03:59:50,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5233, Invalid=18329, Unknown=0, NotChecked=0, Total=23562 [2022-07-12 03:59:50,791 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:50,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 03:59:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 03:59:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-07-12 03:59:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-07-12 03:59:50,814 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2022-07-12 03:59:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:50,815 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-07-12 03:59:50,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-07-12 03:59:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-12 03:59:50,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:50,816 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:50,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-12 03:59:51,027 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,SelfDestructingSolverStorable72 [2022-07-12 03:59:51,027 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2022-07-12 03:59:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:51,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715720281] [2022-07-12 03:59:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:51,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715720281] [2022-07-12 03:59:51,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715720281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:51,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070300317] [2022-07-12 03:59:51,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 03:59:51,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:51,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:51,559 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 03:59:51,559 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 03:59:51,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-12 03:59:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-12 03:59:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:51,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070300317] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:51,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2022-07-12 03:59:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434034283] [2022-07-12 03:59:51,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:51,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 03:59:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 03:59:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 03:59:51,984 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:52,563 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2022-07-12 03:59:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 03:59:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 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 152 [2022-07-12 03:59:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:52,569 INFO L225 Difference]: With dead ends: 164 [2022-07-12 03:59:52,569 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 03:59:52,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 03:59:52,570 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:52,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 23 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 03:59:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2022-07-12 03:59:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-07-12 03:59:52,595 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2022-07-12 03:59:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:52,595 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-07-12 03:59:52,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-07-12 03:59:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-12 03:59:52,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:52,596 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:52,613 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 03:59:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:52,811 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2022-07-12 03:59:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:52,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674780764] [2022-07-12 03:59:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1963 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674780764] [2022-07-12 03:59:54,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674780764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302482551] [2022-07-12 03:59:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 03:59:54,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:54,311 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 03:59:54,319 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 03:59:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 03:59:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:56,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:56,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302482551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:56,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:56,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 119 [2022-07-12 03:59:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167117817] [2022-07-12 03:59:56,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-07-12 03:59:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-07-12 03:59:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=10878, Unknown=0, NotChecked=0, Total=14042 [2022-07-12 03:59:56,494 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:57,829 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2022-07-12 03:59:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 03:59:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 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 155 [2022-07-12 03:59:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:57,830 INFO L225 Difference]: With dead ends: 275 [2022-07-12 03:59:57,830 INFO L226 Difference]: Without dead ends: 157 [2022-07-12 03:59:57,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5559 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5507, Invalid=19299, Unknown=0, NotChecked=0, Total=24806 [2022-07-12 03:59:57,831 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:57,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 615 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 03:59:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-12 03:59:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-12 03:59:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-07-12 03:59:57,858 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2022-07-12 03:59:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:57,858 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-07-12 03:59:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.302521008403361) internal successors, (274), 119 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-07-12 03:59:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-12 03:59:57,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:57,859 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:57,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-12 03:59:58,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:58,074 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2022-07-12 03:59:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:58,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398060271] [2022-07-12 03:59:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:59:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:59:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398060271] [2022-07-12 03:59:58,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398060271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:59:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607432900] [2022-07-12 03:59:58,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:59:58,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:59:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:59:58,647 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 03:59:58,648 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 03:59:58,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:59:58,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:59:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-12 03:59:58,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:59:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:58,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:59:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:59:59,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607432900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:59:59,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:59:59,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2022-07-12 03:59:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143152039] [2022-07-12 03:59:59,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:59:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 03:59:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:59:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 03:59:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 03:59:59,046 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:59:59,642 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2022-07-12 03:59:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 03:59:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 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 156 [2022-07-12 03:59:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:59:59,646 INFO L225 Difference]: With dead ends: 168 [2022-07-12 03:59:59,646 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 03:59:59,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2022-07-12 03:59:59,647 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:59:59,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:59:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 03:59:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-07-12 03:59:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-07-12 03:59:59,672 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2022-07-12 03:59:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:59:59,672 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-07-12 03:59:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 03:59:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-07-12 03:59:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-12 03:59:59,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:59:59,673 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2022-07-12 03:59:59,702 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 03:59:59,887 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,SelfDestructingSolverStorable75 [2022-07-12 03:59:59,887 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:59:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:59:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2022-07-12 03:59:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:59:59,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809061592] [2022-07-12 03:59:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:59:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:59:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2073 proven. 853 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:01,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809061592] [2022-07-12 04:00:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809061592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853707707] [2022-07-12 04:00:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:01,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:01,428 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 04:00:01,429 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 04:00:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2022-07-12 04:00:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:01,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 04:00:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:03,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853707707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:03,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:03,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 122 [2022-07-12 04:00:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643118082] [2022-07-12 04:00:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:03,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-12 04:00:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:03,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-12 04:00:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11437, Unknown=0, NotChecked=0, Total=14762 [2022-07-12 04:00:03,795 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:05,125 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2022-07-12 04:00:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 04:00:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 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 159 [2022-07-12 04:00:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:05,126 INFO L225 Difference]: With dead ends: 282 [2022-07-12 04:00:05,126 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 04:00:05,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5842 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5788, Invalid=20294, Unknown=0, NotChecked=0, Total=26082 [2022-07-12 04:00:05,127 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:05,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 526 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 04:00:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-07-12 04:00:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-07-12 04:00:05,159 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2022-07-12 04:00:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:05,159 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-07-12 04:00:05,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.30327868852459) internal successors, (281), 122 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-07-12 04:00:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-12 04:00:05,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:05,161 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:05,180 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 04:00:05,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-07-12 04:00:05,367 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2022-07-12 04:00:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393915129] [2022-07-12 04:00:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:05,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:05,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393915129] [2022-07-12 04:00:05,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393915129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:05,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066436999] [2022-07-12 04:00:05,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:05,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:05,955 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 04:00:05,955 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 04:00:06,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:06,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:06,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 04:00:06,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:06,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:06,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066436999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:06,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:06,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2022-07-12 04:00:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181274414] [2022-07-12 04:00:06,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:06,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 04:00:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 04:00:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:00:06,359 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:07,001 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-07-12 04:00:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-12 04:00:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 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 160 [2022-07-12 04:00:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:07,002 INFO L225 Difference]: With dead ends: 172 [2022-07-12 04:00:07,002 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 04:00:07,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 04:00:07,003 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 34 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 04:00:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2022-07-12 04:00:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-07-12 04:00:07,029 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2022-07-12 04:00:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:07,029 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-07-12 04:00:07,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-07-12 04:00:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-12 04:00:07,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:07,030 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:07,047 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 04:00:07,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:07,247 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2022-07-12 04:00:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503650109] [2022-07-12 04:00:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:07,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2186 proven. 895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:08,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503650109] [2022-07-12 04:00:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503650109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700912922] [2022-07-12 04:00:08,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:00:08,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:08,884 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 04:00:08,885 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 04:00:09,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-07-12 04:00:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 04:00:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:11,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700912922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:11,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:11,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 125 [2022-07-12 04:00:11,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136001513] [2022-07-12 04:00:11,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-07-12 04:00:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-07-12 04:00:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=12010, Unknown=0, NotChecked=0, Total=15500 [2022-07-12 04:00:11,357 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:12,663 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2022-07-12 04:00:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:00:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 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 163 [2022-07-12 04:00:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:12,664 INFO L225 Difference]: With dead ends: 289 [2022-07-12 04:00:12,664 INFO L226 Difference]: Without dead ends: 165 [2022-07-12 04:00:12,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6132 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6076, Invalid=21314, Unknown=0, NotChecked=0, Total=27390 [2022-07-12 04:00:12,666 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:12,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 450 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-12 04:00:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-12 04:00:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-07-12 04:00:12,693 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2022-07-12 04:00:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:12,693 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-07-12 04:00:12,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.304) internal successors, (288), 125 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-07-12 04:00:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-12 04:00:12,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:12,694 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:12,711 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 04:00:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:12,894 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2022-07-12 04:00:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924173754] [2022-07-12 04:00:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:12,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924173754] [2022-07-12 04:00:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924173754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391347424] [2022-07-12 04:00:13,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:13,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:13,524 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 04:00:13,524 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 04:00:13,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-07-12 04:00:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-12 04:00:13,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:13,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:13,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391347424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:13,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:13,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2022-07-12 04:00:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641611708] [2022-07-12 04:00:13,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 04:00:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 04:00:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 04:00:13,999 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:14,673 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2022-07-12 04:00:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 04:00:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 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 164 [2022-07-12 04:00:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:14,674 INFO L225 Difference]: With dead ends: 176 [2022-07-12 04:00:14,674 INFO L226 Difference]: Without dead ends: 174 [2022-07-12 04:00:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2022-07-12 04:00:14,675 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 41 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-12 04:00:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2022-07-12 04:00:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-07-12 04:00:14,703 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2022-07-12 04:00:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:14,703 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-07-12 04:00:14,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-07-12 04:00:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-12 04:00:14,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:14,704 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:14,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:14,908 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,SelfDestructingSolverStorable79 [2022-07-12 04:00:14,908 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2022-07-12 04:00:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:14,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193052233] [2022-07-12 04:00:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:14,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2302 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193052233] [2022-07-12 04:00:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193052233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178203399] [2022-07-12 04:00:16,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:00:16,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:16,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:16,666 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 04:00:16,666 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 04:00:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:16,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 04:00:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:19,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178203399] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:19,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:19,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 128 [2022-07-12 04:00:19,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6632853] [2022-07-12 04:00:19,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:19,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-12 04:00:19,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-12 04:00:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=12597, Unknown=0, NotChecked=0, Total=16256 [2022-07-12 04:00:19,227 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:20,650 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2022-07-12 04:00:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-12 04:00:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 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 167 [2022-07-12 04:00:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:20,651 INFO L225 Difference]: With dead ends: 296 [2022-07-12 04:00:20,651 INFO L226 Difference]: Without dead ends: 169 [2022-07-12 04:00:20,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6429 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6371, Invalid=22359, Unknown=0, NotChecked=0, Total=28730 [2022-07-12 04:00:20,652 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:20,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 436 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-12 04:00:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-12 04:00:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-07-12 04:00:20,680 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2022-07-12 04:00:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:20,680 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-07-12 04:00:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.3046875) internal successors, (295), 128 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-07-12 04:00:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-12 04:00:20,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:20,681 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:20,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:20,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:20,882 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2022-07-12 04:00:20,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317747162] [2022-07-12 04:00:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:21,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317747162] [2022-07-12 04:00:21,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317747162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986688472] [2022-07-12 04:00:21,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:21,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:21,604 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 04:00:21,605 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 04:00:21,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 04:00:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:21,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:22,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986688472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:22,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:22,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2022-07-12 04:00:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048981362] [2022-07-12 04:00:22,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 04:00:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 04:00:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:00:22,052 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:22,729 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-07-12 04:00:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-12 04:00:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 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 168 [2022-07-12 04:00:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:22,730 INFO L225 Difference]: With dead ends: 180 [2022-07-12 04:00:22,730 INFO L226 Difference]: Without dead ends: 178 [2022-07-12 04:00:22,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2022-07-12 04:00:22,731 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:22,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-12 04:00:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2022-07-12 04:00:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 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 04:00:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-07-12 04:00:22,759 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2022-07-12 04:00:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:22,760 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-07-12 04:00:22,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-07-12 04:00:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-12 04:00:22,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:22,761 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:22,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:22,967 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2022-07-12 04:00:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:22,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143994557] [2022-07-12 04:00:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:22,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2421 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143994557] [2022-07-12 04:00:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143994557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795766946] [2022-07-12 04:00:24,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:24,833 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 04:00:24,833 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 04:00:24,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2022-07-12 04:00:24,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 04:00:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:27,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:27,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795766946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:27,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:27,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 131 [2022-07-12 04:00:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302404373] [2022-07-12 04:00:27,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:27,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-12 04:00:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-12 04:00:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=13198, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 04:00:27,494 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 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 04:00:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:28,980 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2022-07-12 04:00:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 04:00:28,980 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 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) Word has length 171 [2022-07-12 04:00:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:28,981 INFO L225 Difference]: With dead ends: 303 [2022-07-12 04:00:28,981 INFO L226 Difference]: Without dead ends: 173 [2022-07-12 04:00:28,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6733 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6673, Invalid=23429, Unknown=0, NotChecked=0, Total=30102 [2022-07-12 04:00:28,982 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:28,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 520 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-12 04:00:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-07-12 04:00:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-07-12 04:00:29,012 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2022-07-12 04:00:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:29,012 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-07-12 04:00:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.3053435114503817) internal successors, (302), 131 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 04:00:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-07-12 04:00:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-12 04:00:29,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:29,017 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:29,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:29,218 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,SelfDestructingSolverStorable82 [2022-07-12 04:00:29,218 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2022-07-12 04:00:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274867739] [2022-07-12 04:00:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274867739] [2022-07-12 04:00:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274867739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796882761] [2022-07-12 04:00:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:29,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:29,894 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 04:00:29,894 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 04:00:29,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-12 04:00:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:30,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796882761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:30,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:30,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2022-07-12 04:00:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505856954] [2022-07-12 04:00:30,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 04:00:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 04:00:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 04:00:30,316 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:30,994 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2022-07-12 04:00:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-12 04:00:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 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 172 [2022-07-12 04:00:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:30,995 INFO L225 Difference]: With dead ends: 184 [2022-07-12 04:00:30,995 INFO L226 Difference]: Without dead ends: 182 [2022-07-12 04:00:30,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2022-07-12 04:00:30,996 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:30,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 37 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-12 04:00:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2022-07-12 04:00:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-07-12 04:00:31,033 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2022-07-12 04:00:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-07-12 04:00:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-07-12 04:00:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-12 04:00:31,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:31,035 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:31,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-07-12 04:00:31,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:31,247 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2022-07-12 04:00:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:31,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831523908] [2022-07-12 04:00:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2543 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831523908] [2022-07-12 04:00:33,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831523908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606005973] [2022-07-12 04:00:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:00:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:33,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:33,126 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 04:00:33,127 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 04:00:33,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2022-07-12 04:00:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-12 04:00:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:35,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:35,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606005973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:35,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:35,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 134 [2022-07-12 04:00:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357248184] [2022-07-12 04:00:35,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-12 04:00:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-12 04:00:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=13813, Unknown=0, NotChecked=0, Total=17822 [2022-07-12 04:00:35,898 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 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 04:00:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:37,505 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2022-07-12 04:00:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-12 04:00:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 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) Word has length 175 [2022-07-12 04:00:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:37,505 INFO L225 Difference]: With dead ends: 310 [2022-07-12 04:00:37,505 INFO L226 Difference]: Without dead ends: 177 [2022-07-12 04:00:37,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7044 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6982, Invalid=24524, Unknown=0, NotChecked=0, Total=31506 [2022-07-12 04:00:37,507 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:37,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 651 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:00:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-12 04:00:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-07-12 04:00:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-07-12 04:00:37,537 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2022-07-12 04:00:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:37,537 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-07-12 04:00:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.3059701492537314) internal successors, (309), 134 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 04:00:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-07-12 04:00:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 04:00:37,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:37,538 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:37,555 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 04:00:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:37,739 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2022-07-12 04:00:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509771451] [2022-07-12 04:00:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509771451] [2022-07-12 04:00:38,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509771451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363805365] [2022-07-12 04:00:38,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:00:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:38,507 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 04:00:38,508 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 04:00:38,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-07-12 04:00:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-12 04:00:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:38,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:39,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363805365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:39,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:39,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2022-07-12 04:00:39,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097620958] [2022-07-12 04:00:39,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:39,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 04:00:39,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 04:00:39,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:00:39,045 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:39,815 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2022-07-12 04:00:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 04:00:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 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 176 [2022-07-12 04:00:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:39,816 INFO L225 Difference]: With dead ends: 188 [2022-07-12 04:00:39,816 INFO L226 Difference]: Without dead ends: 186 [2022-07-12 04:00:39,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2022-07-12 04:00:39,817 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:39,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-12 04:00:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-07-12 04:00:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-07-12 04:00:39,857 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-07-12 04:00:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:39,858 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-07-12 04:00:39,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-07-12 04:00:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 04:00:39,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:39,858 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:39,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:40,059 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2022-07-12 04:00:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:40,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991036615] [2022-07-12 04:00:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2668 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:42,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:42,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991036615] [2022-07-12 04:00:42,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991036615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:42,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731059955] [2022-07-12 04:00:42,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:00:42,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:42,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:42,152 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 04:00:42,153 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 04:00:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-12 04:00:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:44,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:45,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731059955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:45,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:45,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 137 [2022-07-12 04:00:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308322584] [2022-07-12 04:00:45,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:45,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-07-12 04:00:45,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-07-12 04:00:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=14442, Unknown=0, NotChecked=0, Total=18632 [2022-07-12 04:00:45,016 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 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 04:00:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:46,773 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2022-07-12 04:00:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-12 04:00:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 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) Word has length 179 [2022-07-12 04:00:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:46,774 INFO L225 Difference]: With dead ends: 317 [2022-07-12 04:00:46,774 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 04:00:46,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7362 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7298, Invalid=25644, Unknown=0, NotChecked=0, Total=32942 [2022-07-12 04:00:46,782 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:46,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 567 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:00:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 04:00:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-07-12 04:00:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 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 04:00:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-07-12 04:00:46,825 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2022-07-12 04:00:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:46,826 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-07-12 04:00:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3065693430656933) internal successors, (316), 137 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 04:00:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-07-12 04:00:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-12 04:00:46,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:46,827 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:46,851 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 04:00:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:47,027 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2022-07-12 04:00:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957221744] [2022-07-12 04:00:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:47,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957221744] [2022-07-12 04:00:47,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957221744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499175349] [2022-07-12 04:00:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:00:47,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:47,855 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 04:00:47,855 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 04:00:47,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:00:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-12 04:00:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:48,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:48,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499175349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:48,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:48,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2022-07-12 04:00:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241755776] [2022-07-12 04:00:48,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 04:00:48,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 04:00:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:00:48,367 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:49,240 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-07-12 04:00:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 04:00:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 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 180 [2022-07-12 04:00:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:49,241 INFO L225 Difference]: With dead ends: 192 [2022-07-12 04:00:49,241 INFO L226 Difference]: Without dead ends: 190 [2022-07-12 04:00:49,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2022-07-12 04:00:49,242 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:49,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 37 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-12 04:00:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2022-07-12 04:00:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-07-12 04:00:49,304 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2022-07-12 04:00:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:49,304 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-07-12 04:00:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-07-12 04:00:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-12 04:00:49,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:49,305 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:49,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:49,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:49,530 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:49,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:49,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2022-07-12 04:00:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839131435] [2022-07-12 04:00:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2796 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:51,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839131435] [2022-07-12 04:00:51,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839131435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112481187] [2022-07-12 04:00:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:00:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:51,786 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 04:00:51,786 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 04:00:51,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2022-07-12 04:00:51,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-12 04:00:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:54,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:54,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112481187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:54,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:54,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 140 [2022-07-12 04:00:54,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393063960] [2022-07-12 04:00:54,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:54,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-07-12 04:00:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-07-12 04:00:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=15085, Unknown=0, NotChecked=0, Total=19460 [2022-07-12 04:00:54,941 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:56,507 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2022-07-12 04:00:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 04:00:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 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 183 [2022-07-12 04:00:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:56,507 INFO L225 Difference]: With dead ends: 324 [2022-07-12 04:00:56,508 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 04:00:56,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7621, Invalid=26789, Unknown=0, NotChecked=0, Total=34410 [2022-07-12 04:00:56,509 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:56,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:00:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 04:00:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-07-12 04:00:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-07-12 04:00:56,559 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2022-07-12 04:00:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:56,559 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-07-12 04:00:56,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.307142857142857) internal successors, (323), 140 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-07-12 04:00:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-12 04:00:56,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:56,560 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:56,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-07-12 04:00:56,763 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,SelfDestructingSolverStorable88 [2022-07-12 04:00:56,763 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2022-07-12 04:00:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:56,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680956344] [2022-07-12 04:00:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:56,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:00:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:57,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:00:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680956344] [2022-07-12 04:00:57,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680956344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:00:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175120163] [2022-07-12 04:00:57,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:00:57,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:00:57,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:00:57,524 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 04:00:57,524 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 04:00:57,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:00:57,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:00:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-12 04:00:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:00:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:00:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:00:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175120163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:00:57,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:00:57,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2022-07-12 04:00:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526217745] [2022-07-12 04:00:57,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:00:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 04:00:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:00:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 04:00:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 04:00:57,995 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:00:58,802 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2022-07-12 04:00:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-12 04:00:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 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 184 [2022-07-12 04:00:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:00:58,803 INFO L225 Difference]: With dead ends: 196 [2022-07-12 04:00:58,803 INFO L226 Difference]: Without dead ends: 194 [2022-07-12 04:00:58,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 04:00:58,804 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 99 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:00:58,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:00:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-12 04:00:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-07-12 04:00:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-07-12 04:00:58,837 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2022-07-12 04:00:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:00:58,837 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-07-12 04:00:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:00:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-07-12 04:00:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-12 04:00:58,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:00:58,838 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2022-07-12 04:00:58,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-07-12 04:00:59,054 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,SelfDestructingSolverStorable89 [2022-07-12 04:00:59,055 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:00:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:00:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2022-07-12 04:00:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:00:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706602523] [2022-07-12 04:00:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:00:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:00:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 2927 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706602523] [2022-07-12 04:01:01,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706602523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148624094] [2022-07-12 04:01:01,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:01:01,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:01,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:01,165 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 04:01:01,165 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 04:01:01,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-07-12 04:01:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-12 04:01:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:04,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:04,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148624094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:04,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:04,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 143 [2022-07-12 04:01:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156436371] [2022-07-12 04:01:04,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-07-12 04:01:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-07-12 04:01:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=15742, Unknown=0, NotChecked=0, Total=20306 [2022-07-12 04:01:04,288 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 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 04:01:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:05,943 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2022-07-12 04:01:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 04:01:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 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) Word has length 187 [2022-07-12 04:01:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:05,944 INFO L225 Difference]: With dead ends: 331 [2022-07-12 04:01:05,944 INFO L226 Difference]: Without dead ends: 189 [2022-07-12 04:01:05,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7951, Invalid=27959, Unknown=0, NotChecked=0, Total=35910 [2022-07-12 04:01:05,945 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:05,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:01:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-12 04:01:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-07-12 04:01:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-07-12 04:01:05,979 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2022-07-12 04:01:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:05,979 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-07-12 04:01:05,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.3076923076923075) internal successors, (330), 143 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 04:01:05,980 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-07-12 04:01:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-12 04:01:05,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:05,980 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:05,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:06,181 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2022-07-12 04:01:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249334085] [2022-07-12 04:01:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:06,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:07,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:07,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249334085] [2022-07-12 04:01:07,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249334085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:07,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052489802] [2022-07-12 04:01:07,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:01:07,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:07,010 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 04:01:07,010 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 04:01:07,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-07-12 04:01:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-12 04:01:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:07,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:07,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052489802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:07,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:07,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2022-07-12 04:01:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040749721] [2022-07-12 04:01:07,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:07,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 04:01:07,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 04:01:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 04:01:07,586 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:08,431 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-07-12 04:01:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-12 04:01:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 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 188 [2022-07-12 04:01:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:08,432 INFO L225 Difference]: With dead ends: 200 [2022-07-12 04:01:08,432 INFO L226 Difference]: Without dead ends: 198 [2022-07-12 04:01:08,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2022-07-12 04:01:08,433 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 151 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:08,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 35 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-12 04:01:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2022-07-12 04:01:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 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 04:01:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-07-12 04:01:08,477 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2022-07-12 04:01:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:08,477 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-07-12 04:01:08,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-07-12 04:01:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-12 04:01:08,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:08,477 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:08,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-07-12 04:01:08,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:08,678 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2022-07-12 04:01:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:08,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531969053] [2022-07-12 04:01:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3061 proven. 1217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:10,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531969053] [2022-07-12 04:01:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531969053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300606288] [2022-07-12 04:01:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:01:10,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:10,967 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 04:01:10,967 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 04:01:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 04:01:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:13,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300606288] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:14,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 146 [2022-07-12 04:01:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234790167] [2022-07-12 04:01:14,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-12 04:01:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-12 04:01:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=16413, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 04:01:14,146 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:15,940 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2022-07-12 04:01:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-12 04:01:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 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 191 [2022-07-12 04:01:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:15,941 INFO L225 Difference]: With dead ends: 338 [2022-07-12 04:01:15,941 INFO L226 Difference]: Without dead ends: 193 [2022-07-12 04:01:15,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8358 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8288, Invalid=29154, Unknown=0, NotChecked=0, Total=37442 [2022-07-12 04:01:15,943 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:15,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 629 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:01:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-12 04:01:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-07-12 04:01:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-07-12 04:01:15,978 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2022-07-12 04:01:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:15,978 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-07-12 04:01:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.308219178082192) internal successors, (337), 146 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-07-12 04:01:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-12 04:01:15,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:15,979 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:15,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:16,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:16,179 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:16,180 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2022-07-12 04:01:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665844285] [2022-07-12 04:01:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665844285] [2022-07-12 04:01:17,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665844285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519820738] [2022-07-12 04:01:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:01:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:17,002 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 04:01:17,002 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 04:01:17,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:01:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 04:01:17,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:17,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519820738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:17,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:17,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2022-07-12 04:01:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425720496] [2022-07-12 04:01:17,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 04:01:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 04:01:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 04:01:17,467 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 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 04:01:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:18,340 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2022-07-12 04:01:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-12 04:01:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 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) Word has length 192 [2022-07-12 04:01:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:18,341 INFO L225 Difference]: With dead ends: 204 [2022-07-12 04:01:18,341 INFO L226 Difference]: Without dead ends: 202 [2022-07-12 04:01:18,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2022-07-12 04:01:18,343 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:18,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-12 04:01:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2022-07-12 04:01:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 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 04:01:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-07-12 04:01:18,383 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2022-07-12 04:01:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:18,383 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-07-12 04:01:18,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 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 04:01:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-07-12 04:01:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-12 04:01:18,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:18,384 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:18,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:18,584 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2022-07-12 04:01:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170153317] [2022-07-12 04:01:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3198 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:20,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170153317] [2022-07-12 04:01:20,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170153317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228970791] [2022-07-12 04:01:20,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:20,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:20,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:20,836 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 04:01:20,837 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 04:01:21,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-07-12 04:01:21,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:21,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-12 04:01:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228970791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:24,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:24,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 149 [2022-07-12 04:01:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045051786] [2022-07-12 04:01:24,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-07-12 04:01:24,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-07-12 04:01:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=17098, Unknown=0, NotChecked=0, Total=22052 [2022-07-12 04:01:24,232 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:26,125 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2022-07-12 04:01:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-12 04:01:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 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 195 [2022-07-12 04:01:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:26,126 INFO L225 Difference]: With dead ends: 345 [2022-07-12 04:01:26,126 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 04:01:26,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8704 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8632, Invalid=30374, Unknown=0, NotChecked=0, Total=39006 [2022-07-12 04:01:26,127 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:26,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 616 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:01:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 04:01:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-07-12 04:01:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-07-12 04:01:26,165 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2022-07-12 04:01:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:26,165 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-07-12 04:01:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.3087248322147653) internal successors, (344), 149 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-07-12 04:01:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-12 04:01:26,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:26,166 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:26,184 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 04:01:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:26,366 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:26,366 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2022-07-12 04:01:26,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:26,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307457225] [2022-07-12 04:01:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:26,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307457225] [2022-07-12 04:01:27,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307457225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099980878] [2022-07-12 04:01:27,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:01:27,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:27,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:27,218 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 04:01:27,219 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 04:01:27,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:01:27,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-12 04:01:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:27,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099980878] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:27,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:27,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2022-07-12 04:01:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744067894] [2022-07-12 04:01:27,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:27,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 04:01:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 04:01:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 04:01:27,710 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 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 04:01:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:28,627 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2022-07-12 04:01:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-12 04:01:28,627 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 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) Word has length 196 [2022-07-12 04:01:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:28,628 INFO L225 Difference]: With dead ends: 208 [2022-07-12 04:01:28,628 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 04:01:28,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 04:01:28,630 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:28,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 37 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:01:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 04:01:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2022-07-12 04:01:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-07-12 04:01:28,694 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2022-07-12 04:01:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:28,694 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-07-12 04:01:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 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 04:01:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-07-12 04:01:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-12 04:01:28,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:28,696 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:28,714 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 04:01:28,896 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,SelfDestructingSolverStorable95 [2022-07-12 04:01:28,896 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2022-07-12 04:01:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379851515] [2022-07-12 04:01:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3338 proven. 1318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:31,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379851515] [2022-07-12 04:01:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379851515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574216892] [2022-07-12 04:01:31,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:01:31,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:31,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:31,190 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 04:01:31,191 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 04:01:31,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-07-12 04:01:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 04:01:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:34,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:34,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574216892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:34,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:34,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 152 [2022-07-12 04:01:34,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098280941] [2022-07-12 04:01:34,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:34,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-07-12 04:01:34,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:34,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-07-12 04:01:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=17797, Unknown=0, NotChecked=0, Total=22952 [2022-07-12 04:01:34,645 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:36,567 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2022-07-12 04:01:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-12 04:01:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 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 199 [2022-07-12 04:01:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:36,568 INFO L225 Difference]: With dead ends: 352 [2022-07-12 04:01:36,568 INFO L226 Difference]: Without dead ends: 201 [2022-07-12 04:01:36,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9057 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8983, Invalid=31619, Unknown=0, NotChecked=0, Total=40602 [2022-07-12 04:01:36,570 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:36,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 702 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:01:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-12 04:01:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-07-12 04:01:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-07-12 04:01:36,617 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2022-07-12 04:01:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:36,617 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-07-12 04:01:36,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.3092105263157894) internal successors, (351), 152 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-07-12 04:01:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-12 04:01:36,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:36,618 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:36,643 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 04:01:36,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:36,818 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2022-07-12 04:01:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597431882] [2022-07-12 04:01:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:36,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:37,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597431882] [2022-07-12 04:01:37,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597431882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:37,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521005964] [2022-07-12 04:01:37,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:01:37,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:37,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:37,706 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 04:01:37,707 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 04:01:37,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-07-12 04:01:37,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-12 04:01:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:38,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521005964] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:38,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:38,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2022-07-12 04:01:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909346917] [2022-07-12 04:01:38,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:38,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-12 04:01:38,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-12 04:01:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 04:01:38,286 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:39,208 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2022-07-12 04:01:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-12 04:01:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 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 200 [2022-07-12 04:01:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:39,209 INFO L225 Difference]: With dead ends: 212 [2022-07-12 04:01:39,209 INFO L226 Difference]: Without dead ends: 210 [2022-07-12 04:01:39,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2022-07-12 04:01:39,210 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:39,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 31 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-12 04:01:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-07-12 04:01:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-07-12 04:01:39,256 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2022-07-12 04:01:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:39,256 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-07-12 04:01:39,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-07-12 04:01:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-12 04:01:39,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:39,257 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:39,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:39,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:39,457 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2022-07-12 04:01:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774542165] [2022-07-12 04:01:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3481 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:41,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774542165] [2022-07-12 04:01:41,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774542165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523017574] [2022-07-12 04:01:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:01:41,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:41,886 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 04:01:41,887 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 04:01:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-12 04:01:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:45,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523017574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:45,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:45,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 155 [2022-07-12 04:01:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251361174] [2022-07-12 04:01:45,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:45,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-07-12 04:01:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-07-12 04:01:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5360, Invalid=18510, Unknown=0, NotChecked=0, Total=23870 [2022-07-12 04:01:45,460 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:47,406 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2022-07-12 04:01:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-12 04:01:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 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 203 [2022-07-12 04:01:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:47,407 INFO L225 Difference]: With dead ends: 359 [2022-07-12 04:01:47,407 INFO L226 Difference]: Without dead ends: 205 [2022-07-12 04:01:47,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9417 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9341, Invalid=32889, Unknown=0, NotChecked=0, Total=42230 [2022-07-12 04:01:47,409 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:47,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 644 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:01:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-12 04:01:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-12 04:01:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-07-12 04:01:47,450 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2022-07-12 04:01:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:47,450 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-07-12 04:01:47,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.3096774193548386) internal successors, (358), 155 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-07-12 04:01:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-12 04:01:47,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:47,451 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:47,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:47,651 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,SelfDestructingSolverStorable98 [2022-07-12 04:01:47,652 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2022-07-12 04:01:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:47,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038051550] [2022-07-12 04:01:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038051550] [2022-07-12 04:01:48,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038051550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127716319] [2022-07-12 04:01:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:01:48,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:48,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:48,592 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 04:01:48,593 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 04:01:48,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:01:48,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-12 04:01:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127716319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:49,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2022-07-12 04:01:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458974435] [2022-07-12 04:01:49,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:49,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 04:01:49,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 04:01:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 04:01:49,096 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:49,985 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2022-07-12 04:01:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-12 04:01:49,985 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 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 204 [2022-07-12 04:01:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:49,986 INFO L225 Difference]: With dead ends: 216 [2022-07-12 04:01:49,986 INFO L226 Difference]: Without dead ends: 214 [2022-07-12 04:01:49,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2022-07-12 04:01:49,987 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:49,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 27 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:01:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-12 04:01:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2022-07-12 04:01:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-07-12 04:01:50,029 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2022-07-12 04:01:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:50,030 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-07-12 04:01:50,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-07-12 04:01:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-12 04:01:50,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:50,030 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:50,054 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 04:01:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:50,231 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2022-07-12 04:01:50,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:50,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501364525] [2022-07-12 04:01:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:50,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3627 proven. 1423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:52,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:52,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501364525] [2022-07-12 04:01:52,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501364525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:52,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357435307] [2022-07-12 04:01:52,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:52,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:52,760 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 04:01:52,760 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 04:01:52,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2022-07-12 04:01:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-12 04:01:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates...