./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/nla-digbench-scaling/hard2_unwindbound100.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 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:05:19,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:05:19,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:05:19,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:05:19,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:05:19,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:05:19,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:05:19,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:05:19,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:05:19,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:05:19,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:05:19,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:05:19,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:05:19,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:05:19,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:05:19,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:05:19,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:05:19,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:05:19,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:05:19,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:05:19,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:05:19,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:05:19,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:05:19,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:05:19,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:05:19,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:05:19,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:05:19,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:05:19,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:05:19,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:05:19,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:05:19,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:05:19,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:05:19,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:05:19,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:05:19,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:05:19,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:05:19,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:05:19,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:05:19,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:05:19,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:05:19,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:05:20,002 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:05:20,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:05:20,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:05:20,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:05:20,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:05:20,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:05:20,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:05:20,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:05:20,008 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:05:20,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:05:20,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:05:20,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:05:20,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:05:20,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:05:20,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:05:20,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:05:20,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:05:20,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:05:20,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:05:20,012 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2023-02-15 12:05:20,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:05:20,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:05:20,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:05:20,264 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:05:20,264 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:05:20,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-02-15 12:05:21,270 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:05:21,404 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:05:21,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2023-02-15 12:05:21,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74813b512/19d973db86544d8a9121e9e431b5cfa5/FLAG61f6238ae [2023-02-15 12:05:21,457 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74813b512/19d973db86544d8a9121e9e431b5cfa5 [2023-02-15 12:05:21,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:05:21,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:05:21,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:05:21,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:05:21,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:05:21,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d2fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21, skipping insertion in model container [2023-02-15 12:05:21,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:05:21,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:05:21,576 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2023-02-15 12:05:21,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:05:21,591 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:05:21,599 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2023-02-15 12:05:21,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:05:21,611 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:05:21,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21 WrapperNode [2023-02-15 12:05:21,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:05:21,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:05:21,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:05:21,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:05:21,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,632 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-15 12:05:21,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:05:21,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:05:21,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:05:21,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:05:21,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:05:21,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:05:21,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:05:21,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:05:21,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (1/1) ... [2023-02-15 12:05:21,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:05:21,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:21,706 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) [2023-02-15 12:05:21,757 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 [2023-02-15 12:05:21,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:05:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:05:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:05:21,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:05:21,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 12:05:21,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 12:05:21,813 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:05:21,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:05:21,918 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:05:21,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:05:21,922 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 12:05:21,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:05:21 BoogieIcfgContainer [2023-02-15 12:05:21,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:05:21,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:05:21,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:05:21,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:05:21,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:05:21" (1/3) ... [2023-02-15 12:05:21,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1458c808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:05:21, skipping insertion in model container [2023-02-15 12:05:21,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:05:21" (2/3) ... [2023-02-15 12:05:21,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1458c808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:05:21, skipping insertion in model container [2023-02-15 12:05:21,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:05:21" (3/3) ... [2023-02-15 12:05:21,928 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2023-02-15 12:05:21,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:05:21,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:05:21,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:05:21,970 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@bfacb12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:05:21,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:05:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 12:05:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:05:21,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:21,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:21,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-15 12:05:21,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:21,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982316196] [2023-02-15 12:05:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:21,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:22,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:22,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982316196] [2023-02-15 12:05:22,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 12:05:22,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96282616] [2023-02-15 12:05:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:22,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:22,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:22,058 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) [2023-02-15 12:05:22,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:05:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 12:05:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:05:22,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:05:22,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96282616] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:05:22,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:05:22,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 12:05:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474264401] [2023-02-15 12:05:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:05:22,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 12:05:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 12:05:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:05:22,136 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:22,150 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-15 12:05:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 12:05:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 12:05:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:22,155 INFO L225 Difference]: With dead ends: 50 [2023-02-15 12:05:22,156 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 12:05:22,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 12:05:22,159 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2023-02-15 12:05:22,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:05:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 12:05:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 12:05:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:05:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-15 12:05:22,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-15 12:05:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:22,182 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-15 12:05:22,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-15 12:05:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 12:05:22,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:22,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:22,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 12:05:22,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 12:05:22,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-15 12:05:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:22,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819790746] [2023-02-15 12:05:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:05:22,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819790746] [2023-02-15 12:05:22,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819790746] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:05:22,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:05:22,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:05:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339405660] [2023-02-15 12:05:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:05:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:05:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:05:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:05:22,560 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:22,616 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-15 12:05:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:05:22,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 12:05:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:22,617 INFO L225 Difference]: With dead ends: 36 [2023-02-15 12:05:22,617 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 12:05:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:05:22,619 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:22,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:05:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 12:05:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-15 12:05:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:05:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-15 12:05:22,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-15 12:05:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:22,630 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-15 12:05:22,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-15 12:05:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 12:05:22,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:22,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:05:22,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-15 12:05:22,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129641678] [2023-02-15 12:05:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:22,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:22,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129641678] [2023-02-15 12:05:22,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 12:05:22,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347407612] [2023-02-15 12:05:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:22,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:22,660 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) [2023-02-15 12:05:22,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:05:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 12:05:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:05:22,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:05:22,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347407612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:05:22,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:05:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:05:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986925818] [2023-02-15 12:05:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:05:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 12:05:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 12:05:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:05:22,780 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:22,796 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-15 12:05:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 12:05:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 12:05:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:22,797 INFO L225 Difference]: With dead ends: 42 [2023-02-15 12:05:22,797 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 12:05:22,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 12:05:22,798 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:22,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:05:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 12:05:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 12:05:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:05:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-15 12:05:22,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-15 12:05:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:22,804 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-15 12:05:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 12:05:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-15 12:05:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 12:05:22,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:22,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:22,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:05:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 12:05:23,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-15 12:05:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24287624] [2023-02-15 12:05:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:23,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:05:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:05:23,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24287624] [2023-02-15 12:05:23,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24287624] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:05:23,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:05:23,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:05:23,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169755382] [2023-02-15 12:05:23,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:05:23,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:05:23,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:05:23,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:05:23,142 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:05:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:23,171 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-15 12:05:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:05:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 12:05:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:23,172 INFO L225 Difference]: With dead ends: 42 [2023-02-15 12:05:23,173 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 12:05:23,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:05:23,174 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:23,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:05:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 12:05:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-15 12:05:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 12:05:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-15 12:05:23,179 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-15 12:05:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:23,179 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-15 12:05:23,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 12:05:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-15 12:05:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 12:05:23,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:23,180 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:23,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:05:23,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-15 12:05:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:23,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083999849] [2023-02-15 12:05:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:23,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:23,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:23,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248009202] [2023-02-15 12:05:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:23,189 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) [2023-02-15 12:05:23,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:05:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:05:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:05:23,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:05:23,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083999849] [2023-02-15 12:05:23,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248009202] [2023-02-15 12:05:23,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248009202] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:23,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:23,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 12:05:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366198375] [2023-02-15 12:05:23,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:23,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 12:05:23,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 12:05:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 12:05:23,419 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 12:05:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:23,679 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-15 12:05:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:05:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-02-15 12:05:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:23,682 INFO L225 Difference]: With dead ends: 71 [2023-02-15 12:05:23,682 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 12:05:23,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:05:23,683 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:23,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 79 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:05:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 12:05:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-15 12:05:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 12:05:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-15 12:05:23,698 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-15 12:05:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:23,698 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-15 12:05:23,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 12:05:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-15 12:05:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 12:05:23,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:23,700 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:23,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:05:23,904 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 [2023-02-15 12:05:23,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-15 12:05:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:23,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521278737] [2023-02-15 12:05:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:23,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770842805] [2023-02-15 12:05:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:23,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:23,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:23,923 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) [2023-02-15 12:05:23,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:05:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:05:23,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:05:24,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:05:24,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521278737] [2023-02-15 12:05:24,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:24,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770842805] [2023-02-15 12:05:24,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770842805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:24,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:24,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 12:05:24,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032579670] [2023-02-15 12:05:24,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:05:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:05:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:05:24,239 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:05:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:24,388 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-15 12:05:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:05:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-15 12:05:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:24,391 INFO L225 Difference]: With dead ends: 73 [2023-02-15 12:05:24,391 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 12:05:24,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:05:24,393 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:24,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:05:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 12:05:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-15 12:05:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 12:05:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-15 12:05:24,425 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-15 12:05:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:24,425 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-15 12:05:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:05:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-15 12:05:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 12:05:24,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:24,427 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:24,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:05:24,631 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 [2023-02-15 12:05:24,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-15 12:05:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:24,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057264573] [2023-02-15 12:05:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:24,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:24,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573021542] [2023-02-15 12:05:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:24,642 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) [2023-02-15 12:05:24,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:05:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 12:05:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 12:05:24,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 12:05:24,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:24,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057264573] [2023-02-15 12:05:24,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:24,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573021542] [2023-02-15 12:05:24,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573021542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:24,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 12:05:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577762823] [2023-02-15 12:05:24,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:05:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:05:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:05:24,736 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 12:05:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:24,793 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-15 12:05:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:05:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-15 12:05:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:24,795 INFO L225 Difference]: With dead ends: 165 [2023-02-15 12:05:24,795 INFO L226 Difference]: Without dead ends: 127 [2023-02-15 12:05:24,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:05:24,796 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:24,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:05:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-15 12:05:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-15 12:05:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-15 12:05:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-15 12:05:24,807 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-15 12:05:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:24,807 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-15 12:05:24,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 12:05:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-15 12:05:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 12:05:24,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:24,809 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:24,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 12:05:25,012 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 [2023-02-15 12:05:25,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-15 12:05:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:25,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240891829] [2023-02-15 12:05:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:25,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463333812] [2023-02-15 12:05:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:25,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:25,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:25,022 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) [2023-02-15 12:05:25,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:05:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 12:05:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 12:05:25,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-15 12:05:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240891829] [2023-02-15 12:05:25,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463333812] [2023-02-15 12:05:25,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463333812] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:25,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:25,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-15 12:05:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500643582] [2023-02-15 12:05:25,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:25,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 12:05:25,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 12:05:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:05:25,155 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 12:05:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:25,253 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-15 12:05:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:05:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-15 12:05:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:25,255 INFO L225 Difference]: With dead ends: 249 [2023-02-15 12:05:25,255 INFO L226 Difference]: Without dead ends: 228 [2023-02-15 12:05:25,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:05:25,256 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:25,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:05:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-15 12:05:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-15 12:05:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-15 12:05:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-15 12:05:25,271 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-15 12:05:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:25,272 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-15 12:05:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 12:05:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-15 12:05:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 12:05:25,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:25,273 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:25,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:05:25,478 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 [2023-02-15 12:05:25,478 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-15 12:05:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:25,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969579029] [2023-02-15 12:05:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:25,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:25,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:25,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713713680] [2023-02-15 12:05:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:25,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:25,487 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) [2023-02-15 12:05:25,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:05:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 12:05:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 12:05:25,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 12:05:26,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969579029] [2023-02-15 12:05:26,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713713680] [2023-02-15 12:05:26,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713713680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:26,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-15 12:05:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102328669] [2023-02-15 12:05:26,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:26,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 12:05:26,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 12:05:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 12:05:26,362 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 12:05:31,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:05:33,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:05:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:34,253 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-15 12:05:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:05:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-15 12:05:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:34,282 INFO L225 Difference]: With dead ends: 372 [2023-02-15 12:05:34,284 INFO L226 Difference]: Without dead ends: 299 [2023-02-15 12:05:34,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:05:34,290 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 60 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:34,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 408 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 12:05:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-15 12:05:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-15 12:05:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-15 12:05:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-15 12:05:34,333 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-15 12:05:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:34,333 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-15 12:05:34,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-15 12:05:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-15 12:05:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 12:05:34,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:34,338 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:34,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:05:34,553 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 [2023-02-15 12:05:34,554 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-15 12:05:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259892624] [2023-02-15 12:05:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:34,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:34,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177456144] [2023-02-15 12:05:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:34,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:34,577 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) [2023-02-15 12:05:34,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:05:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 12:05:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 12:05:34,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 12:05:35,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:35,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259892624] [2023-02-15 12:05:35,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:35,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177456144] [2023-02-15 12:05:35,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177456144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:35,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:35,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 12:05:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707438493] [2023-02-15 12:05:35,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:35,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:05:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:05:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:05:35,310 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 12:05:37,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:05:39,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:05:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:39,726 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-15 12:05:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:05:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-15 12:05:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:39,727 INFO L225 Difference]: With dead ends: 341 [2023-02-15 12:05:39,728 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 12:05:39,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:05:39,728 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:39,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 111 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 342 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-15 12:05:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 12:05:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-15 12:05:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-15 12:05:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-15 12:05:39,769 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-15 12:05:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:39,770 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-15 12:05:39,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-15 12:05:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-15 12:05:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:05:39,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:39,772 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:05:39,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 12:05:39,976 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 [2023-02-15 12:05:39,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-15 12:05:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650224182] [2023-02-15 12:05:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:39,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:39,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095960705] [2023-02-15 12:05:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:39,997 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) [2023-02-15 12:05:40,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:05:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:05:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 12:05:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 12:05:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:05:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 12:05:40,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:05:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650224182] [2023-02-15 12:05:40,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:05:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095960705] [2023-02-15 12:05:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095960705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:05:40,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:05:40,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-15 12:05:40,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322128661] [2023-02-15 12:05:40,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:05:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:05:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:05:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:05:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:05:40,528 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 12:05:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:05:40,867 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2023-02-15 12:05:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:05:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2023-02-15 12:05:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:05:40,869 INFO L225 Difference]: With dead ends: 260 [2023-02-15 12:05:40,869 INFO L226 Difference]: Without dead ends: 215 [2023-02-15 12:05:40,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:05:40,870 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:05:40,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:05:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-15 12:05:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2023-02-15 12:05:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 148 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-15 12:05:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2023-02-15 12:05:40,918 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2023-02-15 12:05:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:05:40,919 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2023-02-15 12:05:40,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 12:05:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2023-02-15 12:05:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-15 12:05:40,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:05:40,920 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 12:05:40,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 12:05:41,124 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 [2023-02-15 12:05:41,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:05:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:05:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-15 12:05:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:05:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131013837] [2023-02-15 12:05:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:05:41,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:05:41,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:05:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999945678] [2023-02-15 12:05:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:05:41,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:05:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:05:41,133 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) [2023-02-15 12:05:41,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:05:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:05:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:05:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 12:05:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:05:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 12:05:41,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:06:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 12:06:04,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:06:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131013837] [2023-02-15 12:06:04,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:06:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999945678] [2023-02-15 12:06:04,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999945678] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:06:04,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:06:04,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-15 12:06:04,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823910374] [2023-02-15 12:06:04,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:06:04,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:06:04,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:06:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:06:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-15 12:06:04,142 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 12:06:27,009 WARN L233 SmtUtils]: Spent 22.01s on a formula simplification. DAG size of input: 172 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 12:06:30,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:06:35,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:06:39,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 12:06:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:06:40,681 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2023-02-15 12:06:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:06:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-15 12:06:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:06:40,684 INFO L225 Difference]: With dead ends: 306 [2023-02-15 12:06:40,684 INFO L226 Difference]: Without dead ends: 262 [2023-02-15 12:06:40,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-02-15 12:06:40,685 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 115 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:06:40,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 328 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1063 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2023-02-15 12:06:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-15 12:06:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2023-02-15 12:06:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-15 12:06:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2023-02-15 12:06:40,743 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2023-02-15 12:06:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:06:40,744 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2023-02-15 12:06:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-15 12:06:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2023-02-15 12:06:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 12:06:40,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:06:40,748 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:06:40,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:06:40,948 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 [2023-02-15 12:06:40,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:06:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:06:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-15 12:06:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:06:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198669455] [2023-02-15 12:06:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:06:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:06:40,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:06:40,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111984727] [2023-02-15 12:06:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:06:40,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:06:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:06:40,958 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) [2023-02-15 12:06:40,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:06:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:06:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 12:06:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:06:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-15 12:06:41,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:06:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-15 12:06:41,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:06:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198669455] [2023-02-15 12:06:41,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:06:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111984727] [2023-02-15 12:06:41,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111984727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:06:41,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:06:41,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-15 12:06:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191502348] [2023-02-15 12:06:41,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:06:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:06:41,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:06:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:06:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:06:41,212 INFO L87 Difference]: Start difference. First operand 247 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 12:06:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:06:41,530 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2023-02-15 12:06:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 12:06:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-15 12:06:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:06:41,533 INFO L225 Difference]: With dead ends: 707 [2023-02-15 12:06:41,533 INFO L226 Difference]: Without dead ends: 629 [2023-02-15 12:06:41,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-15 12:06:41,534 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 163 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:06:41,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 293 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:06:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-02-15 12:06:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2023-02-15 12:06:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 362 states have (on average 1.270718232044199) internal successors, (460), 391 states have internal predecessors, (460), 134 states have call successors, (134), 53 states have call predecessors, (134), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-15 12:06:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2023-02-15 12:06:41,651 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2023-02-15 12:06:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:06:41,652 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2023-02-15 12:06:41,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 12:06:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2023-02-15 12:06:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 12:06:41,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:06:41,653 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:06:41,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 12:06:41,863 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 [2023-02-15 12:06:41,863 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:06:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:06:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-15 12:06:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:06:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941257034] [2023-02-15 12:06:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:06:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:06:41,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:06:41,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679924471] [2023-02-15 12:06:41,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:06:41,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:06:41,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:06:41,872 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) [2023-02-15 12:06:41,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:06:41,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:06:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:06:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 12:06:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:06:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 12:06:42,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:06:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-15 12:06:47,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:06:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941257034] [2023-02-15 12:06:47,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:06:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679924471] [2023-02-15 12:06:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679924471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:06:47,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:06:47,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-15 12:06:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676501255] [2023-02-15 12:06:47,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:06:47,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:06:47,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:06:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:06:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-15 12:06:47,289 INFO L87 Difference]: Start difference. First operand 549 states and 721 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 12:07:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:01,719 INFO L93 Difference]: Finished difference Result 672 states and 874 transitions. [2023-02-15 12:07:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:07:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2023-02-15 12:07:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:01,722 INFO L225 Difference]: With dead ends: 672 [2023-02-15 12:07:01,722 INFO L226 Difference]: Without dead ends: 511 [2023-02-15 12:07:01,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-15 12:07:01,723 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 69 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:01,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 237 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-15 12:07:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-02-15 12:07:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 488. [2023-02-15 12:07:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 322 states have (on average 1.2111801242236024) internal successors, (390), 347 states have internal predecessors, (390), 112 states have call successors, (112), 53 states have call predecessors, (112), 53 states have return successors, (107), 87 states have call predecessors, (107), 107 states have call successors, (107) [2023-02-15 12:07:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 609 transitions. [2023-02-15 12:07:01,857 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 609 transitions. Word has length 101 [2023-02-15 12:07:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:01,857 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 609 transitions. [2023-02-15 12:07:01,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 12:07:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 609 transitions. [2023-02-15 12:07:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 12:07:01,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:01,858 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:01,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:02,064 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 [2023-02-15 12:07:02,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-15 12:07:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480735411] [2023-02-15 12:07:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:02,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247041090] [2023-02-15 12:07:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:02,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:02,081 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) [2023-02-15 12:07:02,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 12:07:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:07:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:07:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 12:07:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-15 12:07:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480735411] [2023-02-15 12:07:02,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247041090] [2023-02-15 12:07:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247041090] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:02,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:02,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-15 12:07:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062779413] [2023-02-15 12:07:02,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:02,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 12:07:02,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:02,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 12:07:02,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-15 12:07:02,402 INFO L87 Difference]: Start difference. First operand 488 states and 609 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-15 12:07:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:02,870 INFO L93 Difference]: Finished difference Result 915 states and 1190 transitions. [2023-02-15 12:07:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 12:07:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2023-02-15 12:07:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:02,888 INFO L225 Difference]: With dead ends: 915 [2023-02-15 12:07:02,888 INFO L226 Difference]: Without dead ends: 880 [2023-02-15 12:07:02,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:07:02,891 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 219 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:02,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 382 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:07:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-02-15 12:07:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 867. [2023-02-15 12:07:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 579 states have (on average 1.1468048359240068) internal successors, (664), 619 states have internal predecessors, (664), 206 states have call successors, (206), 81 states have call predecessors, (206), 81 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2023-02-15 12:07:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1068 transitions. [2023-02-15 12:07:03,085 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1068 transitions. Word has length 104 [2023-02-15 12:07:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:03,085 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1068 transitions. [2023-02-15 12:07:03,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-15 12:07:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1068 transitions. [2023-02-15 12:07:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-15 12:07:03,087 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:03,088 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-15 12:07:03,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:03,292 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 [2023-02-15 12:07:03,293 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-15 12:07:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:03,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15103772] [2023-02-15 12:07:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:03,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678590134] [2023-02-15 12:07:03,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:07:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:03,316 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) [2023-02-15 12:07:03,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 12:07:03,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:07:03,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 12:07:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-15 12:07:03,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:06,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15103772] [2023-02-15 12:07:06,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:06,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678590134] [2023-02-15 12:07:06,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678590134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:07:06,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:07:06,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-15 12:07:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050828070] [2023-02-15 12:07:06,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:06,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 12:07:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 12:07:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:07:06,795 INFO L87 Difference]: Start difference. First operand 867 states and 1068 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:07:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:07,085 INFO L93 Difference]: Finished difference Result 897 states and 1097 transitions. [2023-02-15 12:07:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:07:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2023-02-15 12:07:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:07,088 INFO L225 Difference]: With dead ends: 897 [2023-02-15 12:07:07,088 INFO L226 Difference]: Without dead ends: 883 [2023-02-15 12:07:07,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:07:07,089 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:07,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:07:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-02-15 12:07:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 868. [2023-02-15 12:07:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 584 states have (on average 1.1352739726027397) internal successors, (663), 618 states have internal predecessors, (663), 201 states have call successors, (201), 83 states have call predecessors, (201), 82 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2023-02-15 12:07:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1062 transitions. [2023-02-15 12:07:07,283 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1062 transitions. Word has length 122 [2023-02-15 12:07:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:07,283 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1062 transitions. [2023-02-15 12:07:07,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 12:07:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1062 transitions. [2023-02-15 12:07:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-15 12:07:07,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:07,284 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:07,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:07,490 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-15 12:07:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:07,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042472345] [2023-02-15 12:07:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:07,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129137189] [2023-02-15 12:07:07,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:07:07,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:07,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:07,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 12:07:07,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 12:07:07,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:07,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 12:07:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-15 12:07:07,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 12:07:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:07,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042472345] [2023-02-15 12:07:07,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:07,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129137189] [2023-02-15 12:07:07,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129137189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:07,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:07,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-15 12:07:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539736013] [2023-02-15 12:07:07,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:07:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:07:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:07:07,950 INFO L87 Difference]: Start difference. First operand 868 states and 1062 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 12:07:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:08,375 INFO L93 Difference]: Finished difference Result 875 states and 1068 transitions. [2023-02-15 12:07:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:07:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-15 12:07:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:08,379 INFO L225 Difference]: With dead ends: 875 [2023-02-15 12:07:08,379 INFO L226 Difference]: Without dead ends: 865 [2023-02-15 12:07:08,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-15 12:07:08,380 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:08,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 72 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:07:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-02-15 12:07:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 557. [2023-02-15 12:07:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 374 states have (on average 1.106951871657754) internal successors, (414), 394 states have internal predecessors, (414), 115 states have call successors, (115), 67 states have call predecessors, (115), 67 states have return successors, (114), 95 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-15 12:07:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 643 transitions. [2023-02-15 12:07:08,550 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 643 transitions. Word has length 133 [2023-02-15 12:07:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:08,550 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 643 transitions. [2023-02-15 12:07:08,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 12:07:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 643 transitions. [2023-02-15 12:07:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-02-15 12:07:08,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:08,552 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 12, 11, 11, 11, 11, 11, 11, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:08,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 12:07:08,761 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash 694795218, now seen corresponding path program 2 times [2023-02-15 12:07:08,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554232577] [2023-02-15 12:07:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:08,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645874869] [2023-02-15 12:07:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:07:08,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:08,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:08,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 12:07:08,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:07:08,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 12:07:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 2150 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-15 12:07:09,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 370 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-02-15 12:07:09,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554232577] [2023-02-15 12:07:09,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645874869] [2023-02-15 12:07:09,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645874869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:09,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:09,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-15 12:07:09,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437886200] [2023-02-15 12:07:09,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:07:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:07:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:07:09,516 INFO L87 Difference]: Start difference. First operand 557 states and 643 transitions. Second operand has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) [2023-02-15 12:07:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:10,773 INFO L93 Difference]: Finished difference Result 1291 states and 1585 transitions. [2023-02-15 12:07:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 12:07:10,774 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) Word has length 216 [2023-02-15 12:07:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:10,777 INFO L225 Difference]: With dead ends: 1291 [2023-02-15 12:07:10,777 INFO L226 Difference]: Without dead ends: 1278 [2023-02-15 12:07:10,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1267, Invalid=2273, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 12:07:10,779 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 711 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 839 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:07:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2023-02-15 12:07:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1277. [2023-02-15 12:07:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 854 states have (on average 1.1217798594847774) internal successors, (958), 906 states have internal predecessors, (958), 275 states have call successors, (275), 147 states have call predecessors, (275), 147 states have return successors, (274), 223 states have call predecessors, (274), 274 states have call successors, (274) [2023-02-15 12:07:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1507 transitions. [2023-02-15 12:07:11,206 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1507 transitions. Word has length 216 [2023-02-15 12:07:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:11,206 INFO L495 AbstractCegarLoop]: Abstraction has 1277 states and 1507 transitions. [2023-02-15 12:07:11,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) [2023-02-15 12:07:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1507 transitions. [2023-02-15 12:07:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2023-02-15 12:07:11,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:11,212 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 28, 27, 27, 27, 27, 27, 27, 26, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:11,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:11,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 12:07:11,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:11,418 INFO L85 PathProgramCache]: Analyzing trace with hash -743933806, now seen corresponding path program 3 times [2023-02-15 12:07:11,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:11,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463331763] [2023-02-15 12:07:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:11,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334846283] [2023-02-15 12:07:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:07:11,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:11,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:11,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 12:07:12,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-02-15 12:07:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:07:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10116 backedges. 2486 proven. 0 refuted. 0 times theorem prover too weak. 7630 trivial. 0 not checked. [2023-02-15 12:07:12,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:07:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463331763] [2023-02-15 12:07:12,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334846283] [2023-02-15 12:07:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334846283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:07:12,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:07:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 12:07:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319580598] [2023-02-15 12:07:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:07:12,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:07:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:12,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:07:12,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:07:12,848 INFO L87 Difference]: Start difference. First operand 1277 states and 1507 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 12:07:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:13,752 INFO L93 Difference]: Finished difference Result 2101 states and 2551 transitions. [2023-02-15 12:07:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:07:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 440 [2023-02-15 12:07:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:13,757 INFO L225 Difference]: With dead ends: 2101 [2023-02-15 12:07:13,757 INFO L226 Difference]: Without dead ends: 1482 [2023-02-15 12:07:13,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:07:13,759 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:13,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:07:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-02-15 12:07:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1143. [2023-02-15 12:07:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 780 states have (on average 1.0974358974358975) internal successors, (856), 806 states have internal predecessors, (856), 219 states have call successors, (219), 143 states have call predecessors, (219), 143 states have return successors, (218), 193 states have call predecessors, (218), 218 states have call successors, (218) [2023-02-15 12:07:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1293 transitions. [2023-02-15 12:07:14,285 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1293 transitions. Word has length 440 [2023-02-15 12:07:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:14,286 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1293 transitions. [2023-02-15 12:07:14,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 12:07:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1293 transitions. [2023-02-15 12:07:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-02-15 12:07:14,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:14,292 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:14,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:14,500 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1525085741, now seen corresponding path program 1 times [2023-02-15 12:07:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:14,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256087198] [2023-02-15 12:07:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:14,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:14,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497718782] [2023-02-15 12:07:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:14,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:14,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:14,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 12:07:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:07:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 12:07:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-15 12:07:15,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-02-15 12:07:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:16,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256087198] [2023-02-15 12:07:16,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:16,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497718782] [2023-02-15 12:07:16,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497718782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:16,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:16,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66 [2023-02-15 12:07:16,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637203523] [2023-02-15 12:07:16,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:16,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 12:07:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 12:07:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 12:07:16,598 INFO L87 Difference]: Start difference. First operand 1143 states and 1293 transitions. Second operand has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-02-15 12:07:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:20,178 INFO L93 Difference]: Finished difference Result 2469 states and 2907 transitions. [2023-02-15 12:07:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-02-15 12:07:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) Word has length 444 [2023-02-15 12:07:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:20,186 INFO L225 Difference]: With dead ends: 2469 [2023-02-15 12:07:20,186 INFO L226 Difference]: Without dead ends: 2456 [2023-02-15 12:07:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5468, Invalid=9538, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 12:07:20,189 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1761 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 1426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1426 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 1276 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1426 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 12:07:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2023-02-15 12:07:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2455. [2023-02-15 12:07:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 1676 states have (on average 1.1026252983293556) internal successors, (1848), 1734 states have internal predecessors, (1848), 475 states have call successors, (475), 303 states have call predecessors, (475), 303 states have return successors, (474), 417 states have call predecessors, (474), 474 states have call successors, (474) [2023-02-15 12:07:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 2797 transitions. [2023-02-15 12:07:20,962 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 2797 transitions. Word has length 444 [2023-02-15 12:07:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:20,962 INFO L495 AbstractCegarLoop]: Abstraction has 2455 states and 2797 transitions. [2023-02-15 12:07:20,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2023-02-15 12:07:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 2797 transitions. [2023-02-15 12:07:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2023-02-15 12:07:20,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:20,972 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 59, 58, 58, 58, 58, 58, 58, 58, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:20,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:21,178 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1844250541, now seen corresponding path program 2 times [2023-02-15 12:07:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7511064] [2023-02-15 12:07:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:21,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724975091] [2023-02-15 12:07:21,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:07:21,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:21,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:21,201 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:21,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 12:07:21,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:07:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 127 conjunts are in the unsatisfiable core [2023-02-15 12:07:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 256 proven. 42302 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-15 12:07:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 256 proven. 10070 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-02-15 12:07:26,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7511064] [2023-02-15 12:07:26,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724975091] [2023-02-15 12:07:26,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724975091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:26,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:26,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 104 [2023-02-15 12:07:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652574163] [2023-02-15 12:07:26,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-02-15 12:07:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-02-15 12:07:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 12:07:26,619 INFO L87 Difference]: Start difference. First operand 2455 states and 2797 transitions. Second operand has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) [2023-02-15 12:07:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:35,472 INFO L93 Difference]: Finished difference Result 4027 states and 4711 transitions. [2023-02-15 12:07:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2023-02-15 12:07:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) Word has length 892 [2023-02-15 12:07:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:35,483 INFO L225 Difference]: With dead ends: 4027 [2023-02-15 12:07:35,483 INFO L226 Difference]: Without dead ends: 4014 [2023-02-15 12:07:35,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1877 GetRequests, 1654 SyntacticMatches, 26 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6543 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14525, Invalid=24877, Unknown=0, NotChecked=0, Total=39402 [2023-02-15 12:07:35,489 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 3017 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 2600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 5004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2600 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:35,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3017 Valid, 2060 Invalid, 5004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2600 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 12:07:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2023-02-15 12:07:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 4013. [2023-02-15 12:07:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 2740 states have (on average 1.1043795620437957) internal successors, (3026), 2836 states have internal predecessors, (3026), 779 states have call successors, (779), 493 states have call predecessors, (779), 493 states have return successors, (778), 683 states have call predecessors, (778), 778 states have call successors, (778) [2023-02-15 12:07:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 4583 transitions. [2023-02-15 12:07:36,798 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 4583 transitions. Word has length 892 [2023-02-15 12:07:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:36,800 INFO L495 AbstractCegarLoop]: Abstraction has 4013 states and 4583 transitions. [2023-02-15 12:07:36,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) [2023-02-15 12:07:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 4583 transitions. [2023-02-15 12:07:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1425 [2023-02-15 12:07:36,820 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:36,820 INFO L195 NwaCegarLoop]: trace histogram [205, 204, 204, 97, 96, 96, 96, 96, 96, 96, 96, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:07:36,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 12:07:37,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:37,030 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:07:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:07:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash -458177931, now seen corresponding path program 3 times [2023-02-15 12:07:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:07:37,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896856754] [2023-02-15 12:07:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:07:37,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:07:37,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:07:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325802296] [2023-02-15 12:07:37,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:07:37,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:07:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:07:37,065 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:07:37,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 12:07:56,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2023-02-15 12:07:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:07:56,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 12:07:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:07:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 110820 backedges. 16887 proven. 69 refuted. 0 times theorem prover too weak. 93864 trivial. 0 not checked. [2023-02-15 12:07:56,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:07:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 110820 backedges. 2535 proven. 69 refuted. 0 times theorem prover too weak. 108216 trivial. 0 not checked. [2023-02-15 12:07:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:07:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896856754] [2023-02-15 12:07:57,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 12:07:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325802296] [2023-02-15 12:07:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325802296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:07:57,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:07:57,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-02-15 12:07:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004391168] [2023-02-15 12:07:57,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:07:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 12:07:57,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:07:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 12:07:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:07:57,444 INFO L87 Difference]: Start difference. First operand 4013 states and 4583 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2023-02-15 12:07:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:07:58,725 INFO L93 Difference]: Finished difference Result 5604 states and 6367 transitions. [2023-02-15 12:07:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:07:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 1424 [2023-02-15 12:07:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:07:58,736 INFO L225 Difference]: With dead ends: 5604 [2023-02-15 12:07:58,737 INFO L226 Difference]: Without dead ends: 3990 [2023-02-15 12:07:58,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2846 GetRequests, 2837 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 12:07:58,740 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:07:58,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 247 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:07:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2023-02-15 12:07:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3990. [2023-02-15 12:07:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 2724 states have (on average 1.1042584434654918) internal successors, (3008), 2819 states have internal predecessors, (3008), 774 states have call successors, (774), 491 states have call predecessors, (774), 491 states have return successors, (773), 679 states have call predecessors, (773), 773 states have call successors, (773) [2023-02-15 12:07:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 4555 transitions. [2023-02-15 12:07:59,974 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 4555 transitions. Word has length 1424 [2023-02-15 12:07:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:07:59,975 INFO L495 AbstractCegarLoop]: Abstraction has 3990 states and 4555 transitions. [2023-02-15 12:07:59,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2023-02-15 12:07:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 4555 transitions. [2023-02-15 12:07:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1429 [2023-02-15 12:07:59,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:07:59,994 INFO L195 NwaCegarLoop]: trace histogram [206, 205, 205, 96, 95, 95, 95, 95, 95, 95, 95, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:08:00,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 12:08:00,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 12:08:00,213 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:08:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:08:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash -296047278, now seen corresponding path program 4 times [2023-02-15 12:08:00,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:08:00,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827689785] [2023-02-15 12:08:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:08:00,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:08:00,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 12:08:00,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292520692] [2023-02-15 12:08:00,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:08:00,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:08:00,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:08:00,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:08:00,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process