./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:50:23,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:50:23,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:50:23,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:50:23,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:50:23,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:50:23,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:50:23,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:50:23,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:50:23,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:50:23,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:50:23,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:50:23,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:50:23,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:50:23,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:50:23,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:50:23,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:50:23,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:50:23,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:50:23,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:50:23,634 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:50:23,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:50:23,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:50:23,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:50:23,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:50:23,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:50:23,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:50:23,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:50:23,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:50:23,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:50:23,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:50:23,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:50:23,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:50:23,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:50:23,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:50:23,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:50:23,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:50:23,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:50:23,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:50:23,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:50:23,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:50:23,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:50:23,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:50:23,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:50:23,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:50:23,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:50:23,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:50:23,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:50:23,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:50:23,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:50:23,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:50:23,679 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:50:23,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:50:23,679 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:50:23,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:50:23,681 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:50:23,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:50:23,682 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:50:23,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:50:23,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:50:23,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:50:23,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:50:23,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:23,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:50:23,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:50:23,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:50:23,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:50:23,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:50:23,683 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:50:23,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:50:23,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:50:23,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2022-07-19 08:50:23,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:50:23,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:50:23,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:50:23,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:50:23,879 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:50:23,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-07-19 08:50:23,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac105ab4/e5b417959ec842329b10c371f4489b14/FLAGccd4a7eb2 [2022-07-19 08:50:24,288 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:50:24,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-07-19 08:50:24,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac105ab4/e5b417959ec842329b10c371f4489b14/FLAGccd4a7eb2 [2022-07-19 08:50:24,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac105ab4/e5b417959ec842329b10c371f4489b14 [2022-07-19 08:50:24,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:50:24,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:50:24,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:24,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:50:24,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:50:24,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8e9cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:50:24,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:50:24,477 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-07-19 08:50:24,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:24,517 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:50:24,528 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2022-07-19 08:50:24,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:24,553 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:50:24,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24 WrapperNode [2022-07-19 08:50:24,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:24,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:24,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:50:24,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:50:24,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,583 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-07-19 08:50:24,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:24,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:50:24,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:50:24,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:50:24,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:50:24,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:50:24,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:50:24,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:50:24,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:24,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:24,631 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) [2022-07-19 08:50:24,633 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 [2022-07-19 08:50:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:50:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:50:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:50:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:50:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:50:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:50:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:50:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 08:50:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 08:50:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:50:24,759 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:50:24,760 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:50:24,889 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:50:24,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:50:24,901 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-19 08:50:24,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:24 BoogieIcfgContainer [2022-07-19 08:50:24,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:50:24,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:50:24,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:50:24,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:50:24,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:50:24" (1/3) ... [2022-07-19 08:50:24,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb33b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (2/3) ... [2022-07-19 08:50:24,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb33b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:24" (3/3) ... [2022-07-19 08:50:24,924 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2022-07-19 08:50:24,934 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:50:24,934 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:50:24,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:50:24,994 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@6c4b05b5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9103f63 [2022-07-19 08:50:24,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:50:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 08:50:25,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2022-07-19 08:50:25,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958648832] [2022-07-19 08:50:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958648832] [2022-07-19 08:50:25,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958648832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:25,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:50:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460242298] [2022-07-19 08:50:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:50:25,194 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,226 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2022-07-19 08:50:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 08:50:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,233 INFO L225 Difference]: With dead ends: 78 [2022-07-19 08:50:25,237 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 08:50:25,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:50:25,258 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 08:50:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-07-19 08:50:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-19 08:50:25,291 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2022-07-19 08:50:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,291 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-19 08:50:25,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-19 08:50:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 08:50:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:50:25,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2022-07-19 08:50:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168731948] [2022-07-19 08:50:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168731948] [2022-07-19 08:50:25,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168731948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31282646] [2022-07-19 08:50:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,326 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) [2022-07-19 08:50:25,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:50:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:50:25,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:25,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:50:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31282646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:50:25,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:50:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413600407] [2022-07-19 08:50:25,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:50:25,414 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,458 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2022-07-19 08:50:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 08:50:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,463 INFO L225 Difference]: With dead ends: 68 [2022-07-19 08:50:25,463 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 08:50:25,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:50:25,466 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 08:50:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2022-07-19 08:50:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-19 08:50:25,485 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2022-07-19 08:50:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,485 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-19 08:50:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-19 08:50:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 08:50:25,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:25,705 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 [2022-07-19 08:50:25,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2022-07-19 08:50:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755935978] [2022-07-19 08:50:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755935978] [2022-07-19 08:50:25,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755935978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:25,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051344239] [2022-07-19 08:50:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,736 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) [2022-07-19 08:50:25,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:50:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:50:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051344239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:25,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:25,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:50:25,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533058091] [2022-07-19 08:50:25,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:50:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:50:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:25,824 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,855 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2022-07-19 08:50:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:50:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 08:50:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,856 INFO L225 Difference]: With dead ends: 77 [2022-07-19 08:50:25,856 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 08:50:25,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:25,857 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 08:50:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-19 08:50:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-07-19 08:50:25,862 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2022-07-19 08:50:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-07-19 08:50:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-07-19 08:50:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 08:50:25,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,863 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,082 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 [2022-07-19 08:50:26,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2022-07-19 08:50:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304540757] [2022-07-19 08:50:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 08:50:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304540757] [2022-07-19 08:50:26,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304540757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:26,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:26,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 08:50:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423286204] [2022-07-19 08:50:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 08:50:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 08:50:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,141 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,205 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2022-07-19 08:50:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 08:50:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 08:50:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,207 INFO L225 Difference]: With dead ends: 95 [2022-07-19 08:50:26,208 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 08:50:26,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,209 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 08:50:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-07-19 08:50:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-19 08:50:26,214 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2022-07-19 08:50:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,215 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-19 08:50:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-19 08:50:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 08:50:26,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,216 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 08:50:26,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2022-07-19 08:50:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086747022] [2022-07-19 08:50:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 08:50:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086747022] [2022-07-19 08:50:26,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086747022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:26,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:26,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 08:50:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80914554] [2022-07-19 08:50:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 08:50:26,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 08:50:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,280 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,313 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2022-07-19 08:50:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 08:50:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 08:50:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,315 INFO L225 Difference]: With dead ends: 92 [2022-07-19 08:50:26,315 INFO L226 Difference]: Without dead ends: 61 [2022-07-19 08:50:26,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,316 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-19 08:50:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-07-19 08:50:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-07-19 08:50:26,325 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2022-07-19 08:50:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,325 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-07-19 08:50:26,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-07-19 08:50:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 08:50:26,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 08:50:26,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2022-07-19 08:50:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074235056] [2022-07-19 08:50:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074235056] [2022-07-19 08:50:26,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074235056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:26,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376390054] [2022-07-19 08:50:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:26,398 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) [2022-07-19 08:50:26,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:50:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:50:26,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376390054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:26,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:26,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 08:50:26,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839787213] [2022-07-19 08:50:26,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 08:50:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 08:50:26,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 08:50:26,508 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,537 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2022-07-19 08:50:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 08:50:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 08:50:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,541 INFO L225 Difference]: With dead ends: 107 [2022-07-19 08:50:26,541 INFO L226 Difference]: Without dead ends: 65 [2022-07-19 08:50:26,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 08:50:26,547 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-19 08:50:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-19 08:50:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-07-19 08:50:26,555 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2022-07-19 08:50:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,556 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-07-19 08:50:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-07-19 08:50:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 08:50:26,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,557 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2022-07-19 08:50:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301122517] [2022-07-19 08:50:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301122517] [2022-07-19 08:50:26,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301122517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439078007] [2022-07-19 08:50:26,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:26,866 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) [2022-07-19 08:50:26,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:50:26,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 08:50:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 08:50:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:27,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 08:50:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-19 08:50:27,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:50:27,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439078007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:27,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:50:27,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-07-19 08:50:27,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890204531] [2022-07-19 08:50:27,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:27,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 08:50:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 08:50:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:50:27,082 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:27,172 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-19 08:50:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 08:50:27,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 08:50:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:27,174 INFO L225 Difference]: With dead ends: 79 [2022-07-19 08:50:27,176 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 08:50:27,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-07-19 08:50:27,179 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:27,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 169 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 08:50:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-07-19 08:50:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-19 08:50:27,196 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2022-07-19 08:50:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:27,196 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-19 08:50:27,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-19 08:50:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 08:50:27,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:27,197 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:27,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2022-07-19 08:50:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803391516] [2022-07-19 08:50:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 08:50:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803391516] [2022-07-19 08:50:27,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803391516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866303748] [2022-07-19 08:50:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:27,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:27,541 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) [2022-07-19 08:50:27,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:50:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 08:50:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:27,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866303748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:27,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:27,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 08:50:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098445492] [2022-07-19 08:50:27,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:27,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 08:50:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 08:50:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 08:50:27,835 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:27,889 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-07-19 08:50:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 08:50:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-07-19 08:50:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:27,891 INFO L225 Difference]: With dead ends: 141 [2022-07-19 08:50:27,892 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 08:50:27,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 08:50:27,893 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:27,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 174 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 08:50:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-19 08:50:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2022-07-19 08:50:27,918 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2022-07-19 08:50:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:27,919 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2022-07-19 08:50:27,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2022-07-19 08:50:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 08:50:27,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:27,922 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2022-07-19 08:50:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163291301] [2022-07-19 08:50:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 08:50:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:28,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163291301] [2022-07-19 08:50:28,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163291301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:28,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277369251] [2022-07-19 08:50:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:28,418 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) [2022-07-19 08:50:28,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 08:50:28,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:50:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:28,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 08:50:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:29,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277369251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:29,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:29,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-19 08:50:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675538160] [2022-07-19 08:50:29,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 08:50:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 08:50:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 08:50:29,172 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:29,275 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2022-07-19 08:50:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 08:50:29,276 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2022-07-19 08:50:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:29,276 INFO L225 Difference]: With dead ends: 189 [2022-07-19 08:50:29,277 INFO L226 Difference]: Without dead ends: 142 [2022-07-19 08:50:29,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 08:50:29,278 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:29,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 260 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-19 08:50:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-19 08:50:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2022-07-19 08:50:29,285 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2022-07-19 08:50:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:29,286 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2022-07-19 08:50:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2022-07-19 08:50:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-19 08:50:29,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:29,298 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:29,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:29,512 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2022-07-19 08:50:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524807840] [2022-07-19 08:50:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:29,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:30,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-19 08:50:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524807840] [2022-07-19 08:50:30,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524807840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238024851] [2022-07-19 08:50:30,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:50:30,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:30,408 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) [2022-07-19 08:50:30,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 08:50:30,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 08:50:30,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:50:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2022-07-19 08:50:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-07-19 08:50:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238024851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:30,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2022-07-19 08:50:30,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674355351] [2022-07-19 08:50:30,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:30,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 08:50:30,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 08:50:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 08:50:30,546 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:30,724 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2022-07-19 08:50:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 08:50:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2022-07-19 08:50:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:30,728 INFO L225 Difference]: With dead ends: 218 [2022-07-19 08:50:30,728 INFO L226 Difference]: Without dead ends: 171 [2022-07-19 08:50:30,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 08:50:30,730 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 90 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:30,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-19 08:50:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2022-07-19 08:50:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2022-07-19 08:50:30,745 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2022-07-19 08:50:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:30,746 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2022-07-19 08:50:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2022-07-19 08:50:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 08:50:30,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:30,748 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:30,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:30,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2022-07-19 08:50:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893841254] [2022-07-19 08:50:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:31,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-19 08:50:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893841254] [2022-07-19 08:50:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893841254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469493992] [2022-07-19 08:50:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:31,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:31,804 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) [2022-07-19 08:50:31,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 08:50:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:31,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 08:50:31,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:34,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469493992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:34,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:34,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-19 08:50:34,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897223172] [2022-07-19 08:50:34,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:34,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-19 08:50:34,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:34,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-19 08:50:34,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-19 08:50:34,104 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:34,311 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2022-07-19 08:50:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-19 08:50:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2022-07-19 08:50:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:34,313 INFO L225 Difference]: With dead ends: 305 [2022-07-19 08:50:34,313 INFO L226 Difference]: Without dead ends: 250 [2022-07-19 08:50:34,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-19 08:50:34,315 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:34,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 303 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-19 08:50:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-07-19 08:50:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2022-07-19 08:50:34,324 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2022-07-19 08:50:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:34,324 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2022-07-19 08:50:34,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2022-07-19 08:50:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-19 08:50:34,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:34,326 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:34,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:34,539 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,SelfDestructingSolverStorable10 [2022-07-19 08:50:34,540 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2022-07-19 08:50:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140465136] [2022-07-19 08:50:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:37,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-07-19 08:50:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140465136] [2022-07-19 08:50:37,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140465136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004834876] [2022-07-19 08:50:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:37,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:37,384 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) [2022-07-19 08:50:37,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 08:50:37,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:50:37,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-19 08:50:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:37,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:45,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004834876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:45,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:45,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2022-07-19 08:50:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319033132] [2022-07-19 08:50:45,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:45,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-07-19 08:50:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-07-19 08:50:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-19 08:50:45,676 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:46,290 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2022-07-19 08:50:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-19 08:50:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2022-07-19 08:50:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:46,292 INFO L225 Difference]: With dead ends: 501 [2022-07-19 08:50:46,293 INFO L226 Difference]: Without dead ends: 446 [2022-07-19 08:50:46,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-19 08:50:46,295 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 291 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:46,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 174 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 08:50:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-19 08:50:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-07-19 08:50:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 08:50:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2022-07-19 08:50:46,307 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2022-07-19 08:50:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:46,307 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2022-07-19 08:50:46,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:50:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2022-07-19 08:50:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-19 08:50:46,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:46,311 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:46,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:46,528 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2022-07-19 08:50:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552949847] [2022-07-19 08:50:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:57,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-07-19 08:50:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 08:50:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552949847] [2022-07-19 08:50:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552949847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570954639] [2022-07-19 08:50:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:50:57,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:57,265 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) [2022-07-19 08:50:57,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 08:50:57,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 08:50:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 08:50:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2022-07-19 08:50:57,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2022-07-19 08:50:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570954639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:57,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2022-07-19 08:50:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778912854] [2022-07-19 08:50:57,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-19 08:50:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-19 08:50:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2022-07-19 08:50:57,870 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:51:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:51:10,870 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2022-07-19 08:51:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-07-19 08:51:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2022-07-19 08:51:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:51:10,873 INFO L225 Difference]: With dead ends: 554 [2022-07-19 08:51:10,873 INFO L226 Difference]: Without dead ends: 499 [2022-07-19 08:51:10,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2022-07-19 08:51:10,883 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 692 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 08:51:10,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 248 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 08:51:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-19 08:51:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2022-07-19 08:51:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 08:51:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2022-07-19 08:51:10,896 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2022-07-19 08:51:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:51:10,897 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2022-07-19 08:51:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:51:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2022-07-19 08:51:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-07-19 08:51:10,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:51:10,903 INFO L195 NwaCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:51:10,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 08:51:11,124 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,SelfDestructingSolverStorable12 [2022-07-19 08:51:11,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:51:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:51:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2022-07-19 08:51:11,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:51:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808017250] [2022-07-19 08:51:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:51:11,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:51:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:51:22,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2022-07-19 08:51:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:51:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 08:51:22,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:51:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808017250] [2022-07-19 08:51:22,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808017250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:51:22,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756641855] [2022-07-19 08:51:22,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:51:22,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:51:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:51:22,045 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) [2022-07-19 08:51:22,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 08:51:22,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:51:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:51:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 197 conjunts are in the unsatisfiable core [2022-07-19 08:51:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:51:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 08:51:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:51:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 08:51:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756641855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:51:55,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:51:55,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2022-07-19 08:51:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845286922] [2022-07-19 08:51:55,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:51:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2022-07-19 08:51:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:51:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2022-07-19 08:51:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2022-07-19 08:51:55,416 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:51:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:51:58,635 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2022-07-19 08:51:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2022-07-19 08:51:58,639 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2022-07-19 08:51:58,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:51:58,641 INFO L225 Difference]: With dead ends: 955 [2022-07-19 08:51:58,641 INFO L226 Difference]: Without dead ends: 871 [2022-07-19 08:51:58,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2022-07-19 08:51:58,650 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 588 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 08:51:58,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 561 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 08:51:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-19 08:51:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2022-07-19 08:51:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 08:51:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2022-07-19 08:51:58,675 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2022-07-19 08:51:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:51:58,676 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2022-07-19 08:51:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 08:51:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2022-07-19 08:51:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-07-19 08:51:58,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:51:58,683 INFO L195 NwaCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:51:58,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 08:51:58,883 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,SelfDestructingSolverStorable13 [2022-07-19 08:51:58,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:51:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:51:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2116101367, now seen corresponding path program 5 times [2022-07-19 08:51:58,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:51:58,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737564615] [2022-07-19 08:51:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:51:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:51:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:52:42,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 807 [2022-07-19 08:52:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:52:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 153690 backedges. 2 proven. 153664 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 08:52:42,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:52:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737564615] [2022-07-19 08:52:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737564615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:52:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376623343] [2022-07-19 08:52:42,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:52:42,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:52:42,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:52:42,537 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) [2022-07-19 08:52:42,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process