./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/sqm-if.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:34:29,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:34:29,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:34:29,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:34:29,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:34:29,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:34:29,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:34:29,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:34:29,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:34:29,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:34:29,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:34:29,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:34:29,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:34:29,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:34:29,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:34:29,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:34:29,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:34:29,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:34:29,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:34:29,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:34:29,539 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:34:29,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:34:29,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:34:29,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:34:29,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:34:29,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:34:29,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:34:29,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:34:29,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:34:29,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:34:29,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:34:29,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:34:29,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:34:29,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:34:29,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:34:29,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:34:29,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:34:29,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:34:29,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:34:29,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:34:29,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:34:29,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:34:29,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:34:29,592 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:34:29,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:34:29,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:34:29,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:34:29,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:34:29,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:34:29,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:34:29,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:34:29,595 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:34:29,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:34:29,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:34:29,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:34:29,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:34:29,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:34:29,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:34:29,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:34:29,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:34:29,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:34:29,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:34:29,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:34:29,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:34:29,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:34:29,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:34:29,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:34:29,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:34:29,601 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:34:29,601 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:34:29,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:34:29,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 [2022-07-11 23:34:29,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:34:29,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:34:29,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:34:29,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:34:29,855 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:34:29,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm-if.c [2022-07-11 23:34:29,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17549419/83986a788a7e4a718fd6e6b2bb0598dd/FLAG12df46bd6 [2022-07-11 23:34:30,268 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:34:30,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c [2022-07-11 23:34:30,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17549419/83986a788a7e4a718fd6e6b2bb0598dd/FLAG12df46bd6 [2022-07-11 23:34:30,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17549419/83986a788a7e4a718fd6e6b2bb0598dd [2022-07-11 23:34:30,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:34:30,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:34:30,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:34:30,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:34:30,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:34:30,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253d5497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30, skipping insertion in model container [2022-07-11 23:34:30,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:34:30,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:34:30,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-07-11 23:34:30,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:34:30,470 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:34:30,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-07-11 23:34:30,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:34:30,498 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:34:30,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30 WrapperNode [2022-07-11 23:34:30,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:34:30,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:34:30,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:34:30,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:34:30,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,534 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-11 23:34:30,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:34:30,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:34:30,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:34:30,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:34:30,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:34:30,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:34:30,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:34:30,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:34:30,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (1/1) ... [2022-07-11 23:34:30,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:34:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:30,598 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) [2022-07-11 23:34:30,603 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 [2022-07-11 23:34:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:34:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:34:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:34:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:34:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:34:30,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:34:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:34:30,689 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:34:30,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:34:30,815 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:34:30,820 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:34:30,820 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 23:34:30,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:34:30 BoogieIcfgContainer [2022-07-11 23:34:30,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:34:30,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:34:30,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:34:30,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:34:30,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:34:30" (1/3) ... [2022-07-11 23:34:30,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3130b938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:34:30, skipping insertion in model container [2022-07-11 23:34:30,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:34:30" (2/3) ... [2022-07-11 23:34:30,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3130b938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:34:30, skipping insertion in model container [2022-07-11 23:34:30,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:34:30" (3/3) ... [2022-07-11 23:34:30,829 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2022-07-11 23:34:30,841 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:34:30,842 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:34:30,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:34:30,886 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@447078b7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ab7be58 [2022-07-11 23:34:30,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:34:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:34:30,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:30,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:30,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-11 23:34:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851465883] [2022-07-11 23:34:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:31,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851465883] [2022-07-11 23:34:31,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851465883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:34:31,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:34:31,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:34:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300730805] [2022-07-11 23:34:31,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:34:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:34:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:34:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:34:31,093 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:31,106 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-11 23:34:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:34:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-11 23:34:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:31,114 INFO L225 Difference]: With dead ends: 42 [2022-07-11 23:34:31,115 INFO L226 Difference]: Without dead ends: 19 [2022-07-11 23:34:31,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:34:31,124 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:31,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:34:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-11 23:34:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-11 23:34:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-11 23:34:31,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-11 23:34:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:31,149 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-11 23:34:31,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-11 23:34:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:34:31,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:31,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:31,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:34:31,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-11 23:34:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:31,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749357299] [2022-07-11 23:34:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:31,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749357299] [2022-07-11 23:34:31,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749357299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:34:31,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:34:31,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:34:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938907828] [2022-07-11 23:34:31,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:34:31,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:34:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:34:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:34:31,232 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:31,284 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-11 23:34:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:34:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-11 23:34:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:31,285 INFO L225 Difference]: With dead ends: 45 [2022-07-11 23:34:31,286 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 23:34:31,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:34:31,287 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:31,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:34:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 23:34:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-11 23:34:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-11 23:34:31,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-11 23:34:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:31,294 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-11 23:34:31,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-11 23:34:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:34:31,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:31,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:31,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:34:31,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-11 23:34:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825701232] [2022-07-11 23:34:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:31,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:31,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345820981] [2022-07-11 23:34:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:31,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:31,326 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) [2022-07-11 23:34:31,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:34:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:34:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:31,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:34:31,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:34:31,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825701232] [2022-07-11 23:34:31,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345820981] [2022-07-11 23:34:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345820981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:34:31,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:34:31,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:34:31,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489017956] [2022-07-11 23:34:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:34:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:34:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:34:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:34:31,553 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:31,605 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-11 23:34:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:34:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-11 23:34:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:31,607 INFO L225 Difference]: With dead ends: 40 [2022-07-11 23:34:31,607 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:34:31,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:34:31,609 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:31,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:34:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:34:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-11 23:34:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-11 23:34:31,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-11 23:34:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:31,615 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-11 23:34:31,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-11 23:34:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 23:34:31,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:31,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:31,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:31,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:31,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-11 23:34:31,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:31,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836390861] [2022-07-11 23:34:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:31,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:31,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897993378] [2022-07-11 23:34:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:31,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:31,895 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) [2022-07-11 23:34:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:34:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:34:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:32,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:32,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836390861] [2022-07-11 23:34:32,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:32,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897993378] [2022-07-11 23:34:32,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897993378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:32,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:32,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:34:32,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907235766] [2022-07-11 23:34:32,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:32,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:34:32,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:32,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:34:32,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:34:32,090 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:32,239 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-11 23:34:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:34:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 23:34:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:32,241 INFO L225 Difference]: With dead ends: 70 [2022-07-11 23:34:32,241 INFO L226 Difference]: Without dead ends: 43 [2022-07-11 23:34:32,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:34:32,242 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:32,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:34:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-11 23:34:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-11 23:34:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-11 23:34:32,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-11 23:34:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:32,248 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-11 23:34:32,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-11 23:34:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:34:32,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:32,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:32,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:32,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:34:32,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-11 23:34:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508482860] [2022-07-11 23:34:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:32,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:32,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:32,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981278575] [2022-07-11 23:34:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:32,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:32,488 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) [2022-07-11 23:34:32,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:34:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 23:34:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:32,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:32,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:32,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 23:34:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:34:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:32,887 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 21 treesize of output 19 [2022-07-11 23:34:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:34:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508482860] [2022-07-11 23:34:32,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981278575] [2022-07-11 23:34:32,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981278575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:32,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:32,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-11 23:34:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345078347] [2022-07-11 23:34:32,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:34:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:34:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:34:32,919 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:33,058 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2022-07-11 23:34:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:34:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-11 23:34:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:33,060 INFO L225 Difference]: With dead ends: 50 [2022-07-11 23:34:33,060 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:34:33,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:34:33,061 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:33,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-11 23:34:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:34:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-07-11 23:34:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-11 23:34:33,066 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-07-11 23:34:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:33,066 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-11 23:34:33,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-11 23:34:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-11 23:34:33,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:33,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:33,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:33,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2022-07-11 23:34:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:33,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626713592] [2022-07-11 23:34:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:33,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:33,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194406510] [2022-07-11 23:34:33,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:34:33,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:33,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:33,320 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) [2022-07-11 23:34:33,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:34:33,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:34:33,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:34:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:33,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:33,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626713592] [2022-07-11 23:34:33,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:33,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194406510] [2022-07-11 23:34:33,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194406510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:33,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:33,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:34:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123070226] [2022-07-11 23:34:33,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:33,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:34:33,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:34:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:34:33,482 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:33,646 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-11 23:34:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:34:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-11 23:34:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:33,652 INFO L225 Difference]: With dead ends: 98 [2022-07-11 23:34:33,652 INFO L226 Difference]: Without dead ends: 83 [2022-07-11 23:34:33,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:34:33,654 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:33,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:34:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-11 23:34:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-07-11 23:34:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-07-11 23:34:33,673 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-07-11 23:34:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:33,673 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-07-11 23:34:33,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-07-11 23:34:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:34:33,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:33,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:33,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:33,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:33,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-11 23:34:33,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:33,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453444122] [2022-07-11 23:34:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:33,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:33,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825672113] [2022-07-11 23:34:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:33,924 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) [2022-07-11 23:34:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:34:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:34:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:34:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:34,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:34:34,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:34,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 23:34:34,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:34:34,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:34,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-11 23:34:34,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 36 [2022-07-11 23:34:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453444122] [2022-07-11 23:34:35,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825672113] [2022-07-11 23:34:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825672113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:35,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:35,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-11 23:34:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011907881] [2022-07-11 23:34:35,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:34:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:34:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:34:35,019 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:48,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-11 23:34:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:49,530 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-07-11 23:34:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:34:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-11 23:34:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:49,531 INFO L225 Difference]: With dead ends: 140 [2022-07-11 23:34:49,531 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 23:34:49,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 23:34:49,533 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:49,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 133 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 238 Invalid, 1 Unknown, 70 Unchecked, 13.1s Time] [2022-07-11 23:34:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 23:34:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-07-11 23:34:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-11 23:34:49,539 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2022-07-11 23:34:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:49,540 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-11 23:34:49,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-11 23:34:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 23:34:49,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:49,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:49,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:49,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:49,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 3 times [2022-07-11 23:34:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317845719] [2022-07-11 23:34:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:49,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:49,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789387761] [2022-07-11 23:34:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:34:49,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:49,779 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) [2022-07-11 23:34:49,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:34:49,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:34:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 23:34:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:50,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:50,160 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-11 23:34:50,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:34:50,226 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-11 23:34:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:34:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:34:50,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:50,714 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 32 treesize of output 30 [2022-07-11 23:34:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:34:50,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317845719] [2022-07-11 23:34:50,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789387761] [2022-07-11 23:34:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789387761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:50,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:50,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-07-11 23:34:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440224842] [2022-07-11 23:34:50,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:50,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:34:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:34:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:34:50,791 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:51,779 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2022-07-11 23:34:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-11 23:34:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-11 23:34:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:51,780 INFO L225 Difference]: With dead ends: 155 [2022-07-11 23:34:51,780 INFO L226 Difference]: Without dead ends: 133 [2022-07-11 23:34:51,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 23:34:51,782 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 236 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:51,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 145 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 291 Invalid, 0 Unknown, 225 Unchecked, 0.3s Time] [2022-07-11 23:34:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-11 23:34:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 71. [2022-07-11 23:34:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-11 23:34:51,792 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 30 [2022-07-11 23:34:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:51,792 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-11 23:34:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-11 23:34:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 23:34:51,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:51,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:51,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-11 23:34:51,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:51,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash 939270440, now seen corresponding path program 2 times [2022-07-11 23:34:51,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768033488] [2022-07-11 23:34:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:52,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:52,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:52,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767979501] [2022-07-11 23:34:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:34:52,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:52,059 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) [2022-07-11 23:34:52,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:34:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:34:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:34:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:34:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:34:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768033488] [2022-07-11 23:34:52,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767979501] [2022-07-11 23:34:52,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767979501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:52,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:52,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:34:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486476395] [2022-07-11 23:34:52,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:34:52,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:34:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:34:52,229 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:52,382 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-07-11 23:34:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:34:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-11 23:34:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:52,383 INFO L225 Difference]: With dead ends: 128 [2022-07-11 23:34:52,383 INFO L226 Difference]: Without dead ends: 64 [2022-07-11 23:34:52,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:34:52,384 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:52,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 58 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:34:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-11 23:34:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-07-11 23:34:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-11 23:34:52,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 31 [2022-07-11 23:34:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:52,390 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-11 23:34:52,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-11 23:34:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-11 23:34:52,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:52,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:52,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:52,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:52,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-11 23:34:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262839338] [2022-07-11 23:34:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:52,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565071102] [2022-07-11 23:34:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:34:52,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:52,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:52,631 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) [2022-07-11 23:34:52,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:34:52,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:34:52,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-11 23:34:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:52,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:34:52,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:52,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-11 23:34:52,970 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-11 23:34:52,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-11 23:34:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:52,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2022-07-11 23:34:53,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-07-11 23:34:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,145 INFO L356 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-07-11 23:34:53,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 124 [2022-07-11 23:34:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,209 INFO L356 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-07-11 23:34:53,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 29 [2022-07-11 23:34:53,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-07-11 23:34:53,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 152 [2022-07-11 23:34:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:34:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 196 [2022-07-11 23:34:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 58 [2022-07-11 23:34:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:53,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 48 [2022-07-11 23:34:54,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2022-07-11 23:34:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:54,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:34:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262839338] [2022-07-11 23:34:56,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565071102] [2022-07-11 23:34:56,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565071102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:56,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2022-07-11 23:34:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623175165] [2022-07-11 23:34:56,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:56,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-11 23:34:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-11 23:34:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 23:34:56,011 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:58,522 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-07-11 23:34:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 23:34:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-11 23:34:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:58,523 INFO L225 Difference]: With dead ends: 106 [2022-07-11 23:34:58,524 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 23:34:58,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=662, Invalid=3244, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 23:34:58,525 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:58,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 210 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 194 Invalid, 0 Unknown, 311 Unchecked, 0.4s Time] [2022-07-11 23:34:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 23:34:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2022-07-11 23:34:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-07-11 23:34:58,534 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 34 [2022-07-11 23:34:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:58,535 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-07-11 23:34:58,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-07-11 23:34:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-11 23:34:58,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:58,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:58,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:58,741 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,SelfDestructingSolverStorable9 [2022-07-11 23:34:58,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash 180276683, now seen corresponding path program 4 times [2022-07-11 23:34:58,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:58,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50165686] [2022-07-11 23:34:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:58,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213619857] [2022-07-11 23:34:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:34:58,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:58,773 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) [2022-07-11 23:34:58,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:34:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:34:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:34:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:34:58,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:34:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:34:58,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:34:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50165686] [2022-07-11 23:34:58,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:34:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213619857] [2022-07-11 23:34:58,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213619857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:34:58,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:34:58,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:34:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865794570] [2022-07-11 23:34:58,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:34:58,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:34:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:34:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:34:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:34:58,972 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:34:59,261 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-07-11 23:34:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:34:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-11 23:34:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:34:59,262 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:34:59,262 INFO L226 Difference]: Without dead ends: 112 [2022-07-11 23:34:59,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:34:59,263 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:34:59,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 172 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:34:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-11 23:34:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2022-07-11 23:34:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-07-11 23:34:59,273 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 37 [2022-07-11 23:34:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:34:59,273 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-07-11 23:34:59,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:34:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-07-11 23:34:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:34:59,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:34:59,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:34:59,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:34:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:59,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:34:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:34:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-11 23:34:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:34:59,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933870736] [2022-07-11 23:34:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:34:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:34:59,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:34:59,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931919535] [2022-07-11 23:34:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:34:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:34:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:34:59,523 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) [2022-07-11 23:34:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:34:59,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 23:34:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:34:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-11 23:34:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:34:59,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:34:59,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:34:59,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:34:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:34:59,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:59,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:59,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:59,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:34:59,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-11 23:35:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 47 [2022-07-11 23:35:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-07-11 23:35:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-07-11 23:35:00,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 146 [2022-07-11 23:35:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:00,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 199 [2022-07-11 23:35:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:00,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 68 [2022-07-11 23:35:00,991 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-11 23:35:00,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 46 [2022-07-11 23:35:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:01,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:14,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933870736] [2022-07-11 23:35:14,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931919535] [2022-07-11 23:35:14,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931919535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:14,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:14,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-07-11 23:35:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42381418] [2022-07-11 23:35:14,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:14,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-11 23:35:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-11 23:35:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-11 23:35:14,435 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:22,694 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 115 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:35:29,758 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 105 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:35:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:30,887 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-07-11 23:35:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-11 23:35:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-11 23:35:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:30,888 INFO L225 Difference]: With dead ends: 107 [2022-07-11 23:35:30,888 INFO L226 Difference]: Without dead ends: 105 [2022-07-11 23:35:30,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 23:35:30,889 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 200 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 290 Invalid, 0 Unknown, 274 Unchecked, 0.5s Time] [2022-07-11 23:35:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-11 23:35:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2022-07-11 23:35:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 73 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2022-07-11 23:35:30,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 38 [2022-07-11 23:35:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:30,902 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2022-07-11 23:35:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2022-07-11 23:35:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:35:30,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:30,903 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:30,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:31,109 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,SelfDestructingSolverStorable11 [2022-07-11 23:35:31,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash 225973234, now seen corresponding path program 4 times [2022-07-11 23:35:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:31,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536053874] [2022-07-11 23:35:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:31,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174459615] [2022-07-11 23:35:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:35:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:31,150 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) [2022-07-11 23:35:31,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:35:31,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:35:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:35:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:35:31,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 23:35:31,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536053874] [2022-07-11 23:35:31,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174459615] [2022-07-11 23:35:31,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174459615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:31,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:31,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:35:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158643101] [2022-07-11 23:35:31,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:31,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:35:31,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:35:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:35:31,355 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:31,608 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-07-11 23:35:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:35:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-11 23:35:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:31,609 INFO L225 Difference]: With dead ends: 126 [2022-07-11 23:35:31,609 INFO L226 Difference]: Without dead ends: 74 [2022-07-11 23:35:31,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:35:31,610 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:31,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:35:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-11 23:35:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2022-07-11 23:35:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-11 23:35:31,627 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-07-11 23:35:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:31,627 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-11 23:35:31,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-11 23:35:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:35:31,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:31,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:31,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-11 23:35:31,831 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,SelfDestructingSolverStorable12 [2022-07-11 23:35:31,832 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-07-11 23:35:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315075158] [2022-07-11 23:35:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:31,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:31,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101014000] [2022-07-11 23:35:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:35:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:31,859 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) [2022-07-11 23:35:31,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:35:32,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:35:32,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-11 23:35:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:32,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:35:32,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:35:32,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:35:32,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-11 23:35:32,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 119 [2022-07-11 23:35:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-07-11 23:35:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-07-11 23:35:32,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:32,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-11 23:35:33,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 140 [2022-07-11 23:35:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 196 [2022-07-11 23:35:33,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-11 23:35:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:33,249 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:35:33,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 62 [2022-07-11 23:35:33,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:33,368 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:35:33,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2022-07-11 23:35:33,653 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-11 23:35:33,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 39 [2022-07-11 23:35:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:33,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:41,519 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 714 treesize of output 710 [2022-07-11 23:35:41,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:41,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 256 [2022-07-11 23:35:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:41,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:41,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315075158] [2022-07-11 23:35:41,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:41,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101014000] [2022-07-11 23:35:41,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101014000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:41,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:41,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 43 [2022-07-11 23:35:41,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614406584] [2022-07-11 23:35:41,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-11 23:35:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-11 23:35:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 23:35:41,879 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:46,519 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2022-07-11 23:35:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-11 23:35:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-11 23:35:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:46,520 INFO L225 Difference]: With dead ends: 115 [2022-07-11 23:35:46,520 INFO L226 Difference]: Without dead ends: 113 [2022-07-11 23:35:46,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=482, Invalid=2598, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 23:35:46,522 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:46,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 119 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 241 Invalid, 0 Unknown, 537 Unchecked, 0.4s Time] [2022-07-11 23:35:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-11 23:35:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-07-11 23:35:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-07-11 23:35:46,535 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 40 [2022-07-11 23:35:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:46,535 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-07-11 23:35:46,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-07-11 23:35:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:35:46,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:46,536 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:46,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:46,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 23:35:46,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash 587620898, now seen corresponding path program 5 times [2022-07-11 23:35:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035985427] [2022-07-11 23:35:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:46,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:46,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152751554] [2022-07-11 23:35:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:35:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:46,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:35:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:35:49,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-11 23:35:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:35:49,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:50,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035985427] [2022-07-11 23:35:50,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:50,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152751554] [2022-07-11 23:35:50,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152751554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:50,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:50,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-07-11 23:35:50,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563619455] [2022-07-11 23:35:50,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:50,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:35:50,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:35:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:35:50,247 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:50,676 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2022-07-11 23:35:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:35:50,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-11 23:35:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:50,678 INFO L225 Difference]: With dead ends: 228 [2022-07-11 23:35:50,678 INFO L226 Difference]: Without dead ends: 196 [2022-07-11 23:35:50,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 23:35:50,679 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 393 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:50,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 159 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:35:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-11 23:35:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 131. [2022-07-11 23:35:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 130 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-07-11 23:35:50,698 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 42 [2022-07-11 23:35:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:50,698 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-07-11 23:35:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-07-11 23:35:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:35:50,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:50,698 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:50,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:50,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 23:35:50,900 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 7 times [2022-07-11 23:35:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:50,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124943442] [2022-07-11 23:35:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:50,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:50,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:50,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675218313] [2022-07-11 23:35:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:35:50,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:50,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:50,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:35:50,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:35:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-11 23:35:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:51,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:35:51,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:35:51,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-11 23:35:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:51,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-11 23:35:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 79 [2022-07-11 23:35:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-11 23:35:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-11 23:35:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-11 23:35:51,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 139 [2022-07-11 23:35:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 199 [2022-07-11 23:35:51,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-11 23:35:51,933 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:35:51,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 148 [2022-07-11 23:35:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:51,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 216 [2022-07-11 23:35:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:52,147 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:35:52,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 70 [2022-07-11 23:35:52,437 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-11 23:35:52,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2022-07-11 23:35:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:36:12,580 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 122 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:36:19,657 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 29286710 treesize of output 29109558